"The perfect beer calls for the perfect bar," says Heineken's latest ad campaign -- and to prove it, their new commercial demonstrates how a cold glass of their brew can turn even the dingiest dive into a bustling nightclub.

The commercial, titled 'The Switch,' begins with a few friends tumbling off the street into the type of dark, quiet bar you'd probably back out of before ordering a drink. But not our heroes -- they call for Heineken (which, conveniently, turns out to be the only thing on tap), causing the barkeep to begin pulling a series of levers that bring about a magical transformation.

The next thing our brave drinkers know, they're in a fancy retro watering hole, complete with well-dressed revelers, chandeliers and a killer band blasting through a horn-laced R&B rave-up. The band in question: Clairy Browne and the Bangin' Rackettes, an Australian group whose debut album, 'Baby Caught the Bus,' came out last November and includes the song 'Love Letter,' performed here.

Although Browne's gargantuan voice will remind younger listeners of Amy Winehouse -- and her appearance in this commercial certainly won't discourage those comparisons -- the band's roots go deeper, extending to artists such as Sister Rosetta Tharpe, Big Mama Thornton and Etta James. Have a listen in the clip, embedded below.

Hear Clairy Browne and the Bangin' Rackettes' 'Love Letter' in the Heineken 'The Switch' 2012 Commercial