Summer 2007's biggest mysteries
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Avril Lavigne( Samuel Golay / EPA )
The Mystery: Is Avril Lavigne a thief?
The Sleuths: PerezHilton.com, Idolator.com, TMZ.com, YouTubers who have helpfully made side-by-side comparison videos.
The Facts: Avril Lavigne has been accused of stealing from two artists on her third and most recent album, The Best Damn Thing.
The Theories: First, two songwriters for the 1970s group the Rubinoos accused her of plagiarizing their song I Wanna Be Your Boyfriend on the track Girlfriend, and then a Perez reader said her track I Dont Have to Try sounded like Peaches' 2003 song Im the Kinda .
Chance of Being Solved: Low. Accusations like this are easy to make and hard to prove. Lavigne may settle out of court to avoid the negative publicity.