Demi Lovato Feels Like an 'Old Lady' After Rare Night of Clubbing

Demi Lovato looks like a total rocker while performing at an exclusive Clear Channel concert at the iHeartRadio Theater on Monday night (April 14) in Burbank, Calif.

Over the weekend, the 21-year-old singer enjoyed a night out with friends, which took a toll on her since she’s not a big partier.

PHOTOS: Check out the latest pics of Demi Lovato

“Ummm so… I’m dead. I never go clubbing so I feel like an old lady being so tired from ONE night out,” she tweeted. “Now it’s time for a cup of tea and some crime shows.. #keepinitreal Night everyone.” LOL!

In case you missed it, watch Demi and Cher Lloyd perform “Really Don’t Care” together!