Kelly Clarkson’s Stronger tour stopped in L.A. Tuesday night, where the Idol alum treated fans with covers of Britney Spears’ “Till The World Ends” and Whitney Houston’s duet with Mariah Carey, “When You Believe.”

Clarkson has been covering some of her favorite songs, as well as fan-requested songs throughout her tour.

Listen to her take on Britney’s “Till The World Ends” below.

Clarkson invited fellow Idol alum Tamyra Gray to join her in singing the Oscar-winning “When You Believe.”

Kelly Clarkson has five more stops on her Stronger tour, ending in Washington April 14. What do you think of these covers?