In celebration of its 500 millionth stream, Yahoo! TV’s most popular web series Primetime in No Time is tapping web celebrities Michelle Phan, DeStorm Power, and Soleil Moon Frye to guest co-host the show between March 28 and March 30.

Primetime In No TimePrimetime in No Time offers a comical three-minute roundup of the previous night’s primetime TV shows. Host comedian Frank Nicotero (former host of comedy game show Street Smarts) will hand over the reins to the guest hosts, who are promoting a contest starting today on the Yahoo! Facebook page in which fans can enter to win a trip to Los Angeles to watch the special episodes being made.

Phan, the make-up and beauty guru whose YouTube channel has racked up 1.2 million subscribers with over 333 million video views, is the #1 most subscribed female on YouTube. Singer, songwriter, and video editor DeStorm Power is another YouTube powerhouse whose music has been featured in national commercial spots for major brands. And Frye, who starred in the 80s NBC sitcom Punky Brewster, now advises tech startups and owns the organic children’s clothing store Little Seed in Los Angeles.