This is an interesting cover version of Beyonce's song "Single Ladies" performed by Indie rockers Nataly Dawn and Jack Conte who form the group Pomplamoose. Not quite as sexy as the original version, but catchy in its own way. If you want to find more from Pomplamoose check out their YouTube Channel.
There's a bit more info about the group here too, and especially here. Apparently, they are in the top 100 most subscribed to musicians on YouTube. Their cover of Beyonce's song above has had over 2.5 million hits, and they have been able to give up their day jobs because they make enough money from their music.
Well I've just come across them, so there!