Question: When is the composer of song Tik Tok (Song) 's birthday?
Sentence (from "Dr. Luke"): "Who Knew" (2006) for Pink, "Girlfriend" (2007) for Avril Lavigne, and "I Kissed a Girl" (2008) for Katy Perry, before leaving "Saturday Night Live" and reuniting with Clarkson for
Relevant evidence: No