Sarah Michelle Gellar, Taylor Momsen and Blake Lively are among those paying tribute to Michelle Trachtenberg, who died Wednesday.

(CNN) - Kate Beckinsale thinks she looks exactly like Ryan Reynolds. "I look exactly like Ryan Reynolds," Beckinsale told Fallon. Like, when sometimes I see a bus going by with a poster on it, I think, 'Damn, I look hot. Fallon held up a side-by-side photo of Beckinsale and Reynolds and said, "I don't really see it." Time to ask Reynolds if, when he looks in the mirror, he sees Beckinsale staring back.