She may be a powerhouse producer now — with Grey's Anatomy and Scandal going strong on ABC — but before she became the Walter White of addictive dramas, Shonda Rhimes penned the script to a few movies, including one featuring a pop superstar. Which?

We asked Viggle LIVE! users this very question during the April 3 episode of Grey's — and most of you respondents passed the Shondaland citizenship test with flying colors, with 54 percent of you correctly answering that she wrote the Britney Spears-starring Crossroads.

Meanwhile, 25 percent of you guessed the American Idol movie From Justin to Kelly and 21 percent picked the Mariah Carey flick Glitter.

Try your hand at the trivia! Download the free Viggle app now.

Crossroads — which marked Britney's feature film debut — was generally panned by reviewers, with a current Metacritic score of 27/100. It even earned Razzie nominations for both Shonda and Britney.

Still, it earned $61 million with just a $12 million budget, so we doubt Paramount was complaining!

Wanna join Viggle and play fun trivia about the TV you watch? It’s easy and free — and you even get to earn rewards for watching your favorite shows. All you have to do is download the Viggle app, get watching, and join in on the fun!

Dan Clarendon is an assistant editor at Wetpaint Entertainment. Follow him on Twitter and Google+!