The song in the 2012 Heineken commercial "The Switch" is called Love Letter. It is performed by the band Clairy Browne and the Bangin’ Rackettes. Clairy Browne has a similar look and voice to Amy Winehouse.
Clairy Browne and the Bangin’ Rackettes is an Australian band whose music is inspired by Etta James and Sister Rosetta Tharpe. Their debut album Baby Caught the Bus was released in 2011 and includes Love Letter.
Heineken plans to team up with the 007 franchise in September 2012 which will include a commercial featuring Daniel Craig as James Bond.