Commercial Breaks & Beats

I forget which company it is (might be Royal Bank of Scotland), but it's one of those adverts where they take a famous song and change the lyrics. It's been on TV quite a bit. The girl who works at the bank leads the customer into a show with glitter and stuff, like something out of Showgirls, and she wears a purple wig and sings. Then they're back in the bank discussing financial stuff.

Anyone know?

The song is "Minnie The Moocher" by Cab Calloway

Woot, thanks! It's been driving me mad! ^^