For Kelly Clarkson, 2013 has been the Year of the Jam-Packed Schedule. From singing at President Obama's inauguration to attending award shows to filming segments for television, it seems like the country crossover star hasn't had a minute to stop and rest.

For her latest trick, Clarkson stopped by the set of an upcoming CBS show called 'The Crazy Ones' to film a singing performance. So far, few details about the new show have leaked, but we do know that 'Buffy the Vampire' star Sarah Michelle Gellar and comedian Robin Williams are involved.

Williams tweeted a photo of himself flanked by the two beautiful blondes after wrapping a day of filming for the new show.

Entertainment Weekly described 'The Crazy Ones' as "a single-cam comedy about a father (Williams) and daughter (Gellar) who run an advertising agency together."

It's not clear how Clarkson's impressive singing voice fits in to the show, but actor Seth Austin tweeted that he spent the afternoon on set listening to the star perform.

The episode will probably air next fall.

Consider us curious, interested and looking forward to seeing Clarkson on the small screen. She appeared as a mentor on the ABC reality singing competition 'Duets' last summer. The series will not be returning for a second season.