Over the years, I have worked up a method for removing songs stuck in your head. It involves memorizing the first four minutes of the 70's classic by Iron Butterfly. Then all you have to do is get THAT song out of your head, which is easy to do, once you have mastered the trick to it.
Now, unfortunatley, his method is not foolproof - and Ipanema is one of the few that slips through my mental cracks. The reason? It boomerangs! This song can safely be out of your head for hours, hell, i've even gond days, then BOOM - it is back.
Last time I experienced this was from spme dumfuck movie a few years ago where this was the song playing in the elevator right before/during a gunfight. It took me WEEKS to get it out o me skull!