Hilary Duff revealed on Twitter that she is a Lady Gaga fan. She attended a Gaga concert in Pittsburgh.
Hilary first tweeted:
Going to see lady gaga in Pittsburgh with my favorite! Soo pumped! Baby I was born this way!!!
and then later:
Hola tweetybirds!Still coming down off of my lady gaga crush! She's pretty bad ass. What a show!