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We'd be excited if we were seeing Katy Perry and Tegan and Sara too! Sexy mom Jessica Alba was all smiles on Wednesday night as she was entering the Hollywood Bowl to see Katy Perry and others in concert.

For the night out with friends, the 32-year-old outfitted herself in a black pea coat, black leggings, black Isabel Marant wedge sneakers, a yellow sweater and red cross-body bag. The fellow "California Gurl" topped the look off with a train conductor-inspired hat.

The We Can Survive event was a benefit concert featuring Ellie Goulding, Sara Bareilles, Kacey Musgraves, Tegan and Sara, Bonnie McKee and Perry. The fun-filled night of music raised funds for the Young Survival Coalition, an organization supporting young women battling breast cancer.

Perry, whose Prism album dropped on Tuesday, opened up her hour-long set with a hard-rocking take on “I Kissed a Girl.” The 29-year-old singer also crooned “Walking on Air," “Teenage Dream” and “California Gurls” to the packed crowd. The girltastic night ended up with a rousing rendition of Perry's hit song, "Roar," when the cast of female singers joined Perry onstage.