That's right, according to a source, Joan may be more on the mend than we might think:
What an amazeballs cover!
Girl's got some pipes!
When she goes into that chorus, oooooh we get the chills!
Rumer performed the song at her weekly show at The Sayers Club in Hollywood where her some of her biggest fans have been known to show up and support her.
[Image via Apega/Judy Eddy/WENN.]
Tags: amazeballs, amazing, boyfriend, bruce willis, cover, demi, demi moore, famous, hollywood, jayson blair, miley, miley cyrus, music minute, performance, proud, rumer willis, sayers club, support, version, wrecking ball, young hollywood