Brody Jenner and Avril Lavigne

Hills star Brody Jenner and recently-separated songstress Avril Lavigne must've felt pretty confident about their relationship, since they wasted no time getting matching tattoos not once, but twice.  After a night of partying in Vegas, Lavigne got a tat of the number 30 and a lightning bolt on her wrist, and Jenner follwed suit getting it below his ear.  A month later, they stumbled into a Hollywood tattoo parlor, reportedly "completely, utterly out of it," and got the word "FUCK" inked on their ribs.  At least the tats aren't relationship-specific, on the off-chance things don't work out.