Then tell adele to stop singing rolling in the deep . That's older.
She hasn't even performed the song that often. Adele hardly ever promotes, and has been unable to for the last few months if hadn't noticed. And that was the song that catapulted her into the success she's at today, so it was understandable for her to perform it at the Grammys. Plus the right song for the mood of her big 'comeback' after the vocal surgery.
This song's performances however, she should've been doing when it was out. I'm very happy with it's performance/sales chart-wise, but I can only think it would be even bigger in sales and album sales would be better if she were doing these performances four months ago.