Nothing gets the creative juices flowing quite like a broken heart. Countless songs have been written about love gone wrong, but when the failed romantic entanglement involves someone famous, well, that's when things really get interesting. Click through for a host of hit songs that were allegedly inspired by a celebrity ex.

Alanis Morissette, 'You Oughta Know' (1995)
Rumored inspiration: Dave Coulier
Katy Perry, 'Circle the Drain' (2010)
Rumored inspiration: Travie McCoy
Justin Timberlake, 'Cry Me a River' (2002)
Inspiration: Britney Spears
Britney Spears, 'Everytime' (2003)
Rumored inspiration: Justin Timberlake
Pink, 'So What' (2008)
Rumored inspiration: Carey Hart
Carly Simon, 'You're So Vain' (1972)
Rumored inspiration: Take your pick among Warren Beatty, Mick Jagger (who croons background vocals on the tune), Kris Kristofferson, Cat Stevens, Simon's ex-husband, James Taylor, and many, many others.
Taylor Swift, 'Forever & Always' (2008)
Rumored inspiration: Joe Jonas
The Jonas Brothers, 'Much Better' (2009)
Rumored inspiration: Taylor Swift
Miley Cyrus, '7 Things' (2008)
Rumored inspiration: Nick Jonas
Eminem, 'Bagpipes From Baghdad' (2009)
Inspiration: Mariah Carey
Mariah Carey, 'Obsessed' (2009)
Rumored inspiration: Eminem
Rihanna, 'Cold Case Love' (2009)
Inspiration: Chris Brown
Derek and the Dominos/Eric Clapton, 'Layla' (1970)
Inspiration: Patti Boyd, then-wife of George Harrison, who penned the Beatles classic "Something" in her honor.
Sheryl Crow, 'My Favorite Mistake' (1998)
Rumored inspiration: Eric Clapton
Bruce Springsteen, 'Brilliant Disguise' (1987)
Rumored inspiration: Julianne Phillips
Fleetwood Mac, 'Go Your Own Way' and 'Silver Springs' (1976)
Rumored inspiration: Stevie Nicks and Lindsey Buckingham, respectively
Lenny Kravitz, 'It Ain't Over 'Til It's Over' (1991)
Inspiration: Lisa Bonet
Paul Simon, 'Hearts and Bones' (1983)
Rumored inspiration: Carrie Fisher
Jackson Browne, 'I'm Alive' (1993)
Rumored inspiration: Daryl Hannah
Joan Baez, 'Diamonds & Rust' (1975)
Inspiration: Bob Dylan
Frank Sinatra, 'I'm a Fool to Want You' (1951)
Rumored inspiration: Ava Gardner
Kenny Chesney, 'Nowhere to Go, Nowhere to Be' (2008)
Rumored inspiration: Renée Zellweger
OutKast/Andre 3000, 'Ms. Jackson' (2000)
Rumored inspiration: Erykah Badu, Andre's ex-girlfriend and the mother of his son, Seven.
Peter Gabriel, 'Digging in the Dirt' (1992)
Rumored inspiration: Rosanna Arquette, who also inspired the Toto hit "Rosanna," which you will now have stuck in your head for the rest of the day. We're really sorry about that.

Madonna, 'Miles Away' (2008)
Inspiration: Guy Ritchie
Nick Lachey, 'What's Left of Me' (2006)
Rumored inspiration: Jessica Simpson