See the season's newest couples
Michelle Trachtenberg and Jason Segel
Flirt alert! A source tells Us that the How I Met Your Mother
star and Gossip Girl actress "were all over each other" at a mutual
pal's Aug. 8 birthday party at the Thompson Beverly Hills' rooftop bar. "She
was laughing at all his jokes and they were sitting so close," the witness
says. "Everyone noticed. It was beyond friendly."