Yes, definitely not Adele.
And yes, you're right M|Ilo.. this was at The Brits (The UK equivalent of The Grammys) this time last year. This performance, most people agree, was what really catapulted Adele into the big time.
Adele is definitely a national treasure - she's a very down to earth, funny, endearing woman. She's not that interested in UK politics... not really her bag, so its ironic that someone would pretend she's making statements about US politics.