Blood, they say, is thicker than water. When Matthew Knowles and Beyonce ended their business relationship earlier this week, both stressed the fact that family is still family. "He is my father for life and I love my dad dearly," Beyonce said in her statement.

"I love my daughter and I'm very proud of who she is and all that she has achieved," Mathew echoed. All things considered, they handled the split with grace. But celebrity families are almost never drama-free. Here's a look at the good, the bad, and the awkward.

Roseanne & Johnny Cash: Johnny Cash's game-changing sound inspired a generation of musicians, among them his eldest daughter Roseanne. When she turned 18, her father gave her a list of what he considered essential American songs after learning that her music knowledge was limited to the songs on the radio.

She took poppa's gift of music and made a stable and successful career out of it. The two teamed up on the quietly wounded "September When It Comes," which appears on Rosanne's Rules of Travel album.

Beyonce & Mathew Knowles: We'll never know exactly what went down in the Knowles household, but from this vantage point, their relationship seemed like it was rooted in respect. Poppa Knowles was incredibly protective of Beyonce and sister Solange. He helped launch Bey's career and watched her grow from a pop tart to a global phenom.

With more success came more scrutiny. Gossip rags in search of dirt finally struck a treasure chest when TMZ reported that Mathew Knowles had fathered a child with actress Alexsandra Wright while married to Tina Knowles. That rare scandal probably played a role in their split, but sometimes it's okay to say "goodbye."