Pop star Nicole Scherzinger has brushed up on her comedy skills by taking an improvisation course in Los Angeles.

The former Pussycat Dolls singer enrolled in classes to learn comedy basics with the Upright Citizens Brigade, a sketch group which has spawned funny stars including Amy Poehler, Horatio Sanz and Rich Fulcher.

She took to her Twitter.com page this week (30Apr13) to announce she recently wrapped up her lessons, and posted a photo of herself pulling faces with her fellow classmates.

Scherzinger tweeted, "Woohoo just graduated Improv 101 from Ucb in La! What a crazy, fun experience & the best classmates!"