Ch-ch-check out the tweets (below)!
[Image via Jason Merritt/Getty Images.]
The powerhouse got some very talented help for her live performance of Roar at the Hollywood Bowl last night!
The night of AHmazing music in the outdoor theater ended with a purrrrrfect collaboration of vocals between Tegan And Sara, Ellie Goulding, Sara Bareilles, Kacey Musgraves, and her songwriting partner Bonnie McKee.
Can you say girl power??!