The Wainwrights - Canadian folk legends, father Loudon Wainwright, mother Kate McGarrigle, and kids Rufus and Martha Wainwright, are notorious for airing their family drama on the stage. Louden famously wrote and performed a song called "Hitting You" about Martha, while Martha retaliated with the song "Bloody Mother Fucking Asshole". After the parents' divorce and Kate's death, Rufus, Martha and Loudon have collaborated together on several different projects.
The Jacksons - Michael was the 8th of ten Jackson children, and the youngest of the R&B pop sensation The Jackson Five. Joe, his father, managed the band and admitted to emotionally and physically abusing him as a child. Michael's troubled later life is often attributed to his complicated childhood in the family band.
The Everly Brothers - Famous for their catchy harmonies that inspired The Beatles, Phil and Don became heavily addicted to drugs in the early 70s. In a show at Knott's Berry Farm, Don smashed his guitar and stormed off stage while Don finished the show. They reunited in 1983.
The Pointer Sisters - Sisters June, Bonnie, Anita and Ruth were behind the 80s hits "I'm So Excited" and "Jump (For My Love)". In the 90s, June was consistently missing shows, so Bonnie's daughter Issa stepped in to join the group. After June passed away in 2006, Bonnie claimed the other sisters had blocked her out of the funeral and disobeyed June's burial wishes. They were estranged until Bonnie joined Anita for a radio show performance in 2007.
Oasis - Brothers Liam and Noel Gallagher made up this 90s alternative rock band. After their many physical disputes, including a fight with a cricket bat, the band split and and Noel described Liam as "rude, arrogant, intimidating and lazy. He's the angriest man you'll ever meet. He's like a man with a fork in a world of soup." They temporarily reconciled via text in 2012 when Manchester City won the Premier League, but apparently communication broke down again when Noel refused to get the band back together for a reunion tour.