Pete Wentz Michelle TrachtenbergWhether it was just an innocent coffee date or a similarly single shoulder to cry on, Pete Wentz is giving estranged wife, Ashlee Simpson, a run for her recent PDA money by stepping out with former flame, Michelle Trachtenberg.

The Fall Out Boy frontman, 32, and 'Gossip Girl' cutie, 25, were spotted over the holiday weekend grabbing coffee in LA. According to People, the pair dated before Wentz married Simpson in 2008 and seem to be picking up right where they left off. The amicable exes, Wentz and Simpson, are currently undergoing legal proceedings in their divorce.

Just last month, Simpson and her new beau, 'Boardwalk Empire, star, Vincent Piazza, showed some major PDA after their own coffee date in June -- what is it about caffeine and these couples?