Selena Gomez starstruck by Rachel McAdams

London: Pop star Selena Gomez "froze" when she ran into "True Detective" star Rachel McAdams at an acting class.

The 23-year-old "Heart Wants What It Wants" hitmaker said she was left completely starstruck after an unexpected encounter with McAdams, 36, reported Female First.

"Rachel McAdams and I actually walked into the same acting lesson. She's so pretty without make-up! I didn't know what to do. I just froze," she said.