British singer, Adele recently did a cover of Cheryl Cole's hit single "Promise This" during an interview promoting her album "21"
I have to say, Adele sang the song 10 times better LIVE than what Cheryl did on Alan Carr show a while ago. Even when she sung the acoustic version, people still said that she was miming aka lip syncing, but either way I love Cheryl and the music she puts out.
In the end, we all know that Cheryl is not a singer. She's more of a dancer/performer.
Above you will see Adele's cover. At the bottom you'll see Cheryl acoustic performance.