I've been at this call center for nearly 3 months but the last two weeks things have changed in the office. In our call centre, music is played all day to motivate staff but in the last two weeks, one of the trainers keeps putting on the Village People song "Macho Man". Apparently this is meant to be for me, and this trainer goes near to my desk and starts telling me in front of everyone to get up and dance like in the song to it as it's supposedly my song (why is it my song - are they saying I'm gay or camp?!). I thought it was some joke at first, but at the same time when the whole office was looking at me, I can't help but have felt embarrassed and blush. It's even more humiliating for me as I'm 33 and everyone else in the office is in their early mid 20s. In the last week the trainer in question has put on the "Macho Man" song at least 10 times a days sometimes several times in a row, encouraging me to dance and look stupid. I haven't done it... usually I try to ignore it. For the most part, when the song played, I didn't think anything of it, but now realise it's only put on because of me.
Today a number of co-workers told me after work during after work drinks that I "need to stand up for yourself" as I'm being bullied. I didn't want to be over-sensitive or paranoid, but actually they are right: I am being bullied and humiliated and this needs to stop. That is one of my problems - never knowing when or how or if I should stick up for myself. Now I feel terrible. I've been made a total fool of in front of 30 people everyday several times a day for the past two weeks. What should I do?

Stand up for yourself, tell them to play something else but without getting too aggressive.
If it continues or worsens tell your boss. If that doesn't help go to court for it, it counts as harassment. Don't get physical because for one they are all young kids and seemingly imature. Plus you could get in trouble for it. Unless you see him somewhere private do whatcha have to ;]