Nicole and Natalie Appleton of All Saints

All Saints became one of the biggest girlbands of all time in the late 1990s, and two of the foursome were sisters Nicole and Natalie Appleton.

The sisters later formed their own duo, Appleton, which resulted in their one and only underrated album Everything's Eventual.

The Nolans

Anne, Denise, Maureen, Linda, Bernie and later Coleen Nolan were one of the most successful girl groups of all time, selling over 25 million records worldwide.

The Proclaimers

One of the few groups to sing in their natural thick Scottish accent, twins Charlie and Craig Reid scored several big hits in the '80s, including the classic '500 Miles'.

Debbi and Vicki Peterson of The Bangles

The Peterson sisters take up half of the legendary Bangles, with Debbi on drums and vocals, and Vicki on lead guitar and vocals.

The group are still together today, and are best known for their '80s classics 'Walk Like an Egyptian' and 'Eternal Flame'.

Ali and Robin Campbell of UB40

Ali and Robin Campbell were among the founding members of reggae giants UB40, scoring hit after hit from the '70s to the '90s.

However, Ali later quit the band and formed his own version of UB40, while the original now features Robin and their other brother Duncan. All a bit awkward!

We'll always remember the good times, though... and that includes Ali and Robin's appearance on Pato Banton's 'Baby Come Back' in 1994.

Martin and Gary Kemp of Spandau Ballet

The Kemps were part of one of the biggest New Romantic groups of the '80s, and they went on to each have successful acting careers.

Martin and Gary famously played the Kray twins in a big screen story of the gangsters' story, winning plaudits for their career change.

Bros

Twins Matt and Luke Goss, along with original member Craig Logan, became the biggest boyband of the late 1980s.

Despite an acrimonious breakup, the brothers secured an unexpected comeback in 2018, thanks to the release of a critically-acclaimed documentary about their return to live performing after decades apart.

The Williams Brothers

Andy Williams became such a huge star on his own, that it's easy to forget that he originally found fame as part of a group with his three older brothers.

Bob, Don, Dick and Andy Williams formed a singing quartet in the mid-1930s, managed by their father Jay. The four continued to perform together on and off until the 1990s.

The Corrs

The Corrs - What Can I Do [Official Video]

The Corrs consists of the Corr siblings: Andrea (lead vocals, tin whistle, ukulele), Sharon (violin, keyboards, vocals), Caroline (drums, percussion, piano, bodhrán, vocals), and Jim (guitar, piano, keyboards, vocals).

The Irish foursome were absolutely massive in the 1990s, scoring hits including 'Dreams', 'What Can I Do' and 'Breathless'.

The Osmonds

The Osmonds were THE boyband of the 1970s, and no doubt covered the walls of countless fans' rooms at the time.

The Osmond Brothers began as a barbershop quartet consisting of brothers Alan, Wayne, Merrill and Jay, and were later joined by younger siblings Donny and Jimmy.

Donny has also performed with sister Marie for many years, and continues to be hugely popular around the world.

The Pointer Sisters

One of the best soul and R&B groups of the '80s thanks to hits including 'Automatic' and 'Slow Hand', the group consisted of June, Bonnie, Anita and Ruth.

The group are still going to this day, though they now feature Ruth's daughter Issa and granddaughter Sadako. June passed away in 2006.

Heart

Ann and Nancy Wilson have been the beating thump of Heart since the band's formation in 1973.

Known for their hits including 'Alone' and 'Barracuda', the duo have had ups and downs over the years, but have thankfully announced an upcoming reunion tour.

Sparks

When it comes to quirky and thought-provoking pop, Sparks are your guys.

Ron and Russell Mael - best known for the hit 'This Town Ain't Big Enough for Both of Us' - have released an incredible 24 albums, and continue to impress and confuddle fans and critics alike.

Sister Sledge

As you can probably guess, Sister Sledge consisted of sisters Debbie, Joni, Kim and Kathy Sledge.

They became one of the biggest disco acts of the late '70s and early '80s with hits including 'We Are Family' and 'Lost in Music'.

Kathy and Joni sadly passed away in 2011 and 2017 respectively, but Debbie and Kim continue to perform together.

Noel and Liam Gallagher of Oasis

If you're talking sibling rivalry in pop and rock history, then Oasis clearly springs to mind.

The Gallagher brothers became one of the biggest bands of all time thanks to their Britpop classics in the 1990s and 2000s, but they famously fell out by the end of the decade.

Hardly speaking since then, fans are hoping for one of the most anticipated reunions of all time.

Brian, Dennis, and Carl Wilson of The Beach Boys

Brothers Brian, Dennis and Carl formed the Beach Boys with cousin Mike Love and friend Al Jardine in 1961.

There may have been plenty of fallings out over the years, but the family connection of the group clearly translated into iconic music.

The Everly Brothers

You can't think of '50s music without The Everly Brothers. Their harmonising vocals and catchy tunes were a huge inspiration on the likes of The Beatles and Simon & Garfunkel.

Despite falling out for many years, Don and Phil Everly enjoyed several comebacks until Phil's death in 2014.

The Jacksons

When it comes to pop families, you can't really beat The Jacksons.

Originally The Jackson 5 consisting of Jackie, Tito, Jermaine, Marlon and Michael, they later became The Jacksons with the inclusion of Randy.

The Jacksos have sold over 100 million records worldwide, making them one of the best-selling bands of all time.

Carpenters

On paper, a duo consisting of a brother and sister singing ballads shouldn't have worked, but Karen and Richard Carpenter were one of the greatest groups of the 1970s, if not all time.

With Richard providing much of the group's sound and production, alongside Karen's incredible vocals, their music will forever be timeless.

Bee Gees

Brothers Barry, Robin and Maurice Gibb were unconventional pop stars, but they took over the music landscape for several decades.

From their 1960s folk origins, to their disco pomp of the '80s and beyond, the Gibbs were a force to be reckoned with, and also provided many huge hits for other artists.

There was also Andy Gibb, their younger brother who had a successful pop career of his own.