So what's a star who has fallen on hard times to do? Guest star on a TV show! Just like Britney did on How I Met Your Mother, Lindsay Lohan has her own guest stint for Ugly Betty! (We told you that she might appear on the show back in November, but it's finally happening!) She began shooting on Saturday and was so excited that she "arrived on set 45 minutes early," a source tells Us Weekly, adding that "Lindsay and America [Ferrera] really hit it off!" Lindsay's first of multiple eppies airs on the May 22 season finale. We don't know about you, but we're definitely tuning in!

In other Ugly Betty news, contrary to reports, America is not engaged to her longtime BF, Ryan Piers Williams. (Similar reports surfaced last February as well, but proved to be false) America was spotted wearing what looked like an engagement ring on set last week, but (spoiler alert!) the ring may actually be part of a plot twist for the show.