it deserves it, and i Think a stellar p/f will do wonders.
the situation is different to Brits 2011 obviously, but Adele has amazing promo power when she performs!
that performance has to be acompanied by the video release next day plus the Spotify release of the song... then we have the BBC concert airing there... and a couple of days later she should do Ellen as it is rumoured to give the song the last boost that week to get the #1...
then it should be the UK week with the Brits... before that Im sure the song will be already top15-20 with the radio playing it plus Spotify plus little effect from the Grammy performance... then she will perform at the Brits and she should do one or 2 more promo spots in the UK...
