Foster guest-starred as herself on the HBO series Entourage, in which she had a romantic tryst with character Vincent Chase before appearing on Jimmy Kimmel Live! in the episode “Talk Show”. She briefly hosted Entertainment Tonight spin-off ET on MTV in 2002. Based on that she was cast as the lead femme fatale in The Big Bounce, a remake of a movie adaptation of the same novel by Elmore Leonard. She has also appeared in the Backstreet Boys music video “Shape of My Heart“, as well as music video for “Drop That Baby” by The Wondergirls.
In 2004, she played crime-fighting bisexual spy Amy in Angela Robinson‘s film D.E.B.S.. In 2009, she signed on to play Jen Clark, the sister of Naomi Clark, on The CW drama series 90210. Additionally, Foster starred in the 2010 science-fiction film Psych 9, which was directed by Andrew Shortell.