Eurovision has a long history with insane song titles and lyrics. It all started very quickly when the songwriters realized they needed a hook that could be understood in all corners of Europe, in every language. So, put something that means nothing (or sounds in other languages like it means nothing even if in your language it does, like Oui, oui, oui, oui, Pomme, pomme, pomme Bana bana or Qele qele) and preferably repeat it over and over again until boredom or irritation and you were at least noticed.
1960's and 1970's were the golden era with this stuff when songs like Voi voi, Tipi-tii, Boum badaboum, Ring-dinge-ding, Tom tom tom and Daili dou were sent with variable success. Simple La, la la or Boom bang-a-bang and Ding-a-dong proved more popular. Yet by the critics Eurovision is just this; nonsense lyrics but then doesn't it just prove the fact they are memorable?
The 1980's didn't count much on this strategy when one can only pick up Bem bom and Didai didai dai and the icing on the cake Diggi-loo, diggi-ley as well as Boogaloo. The Swedes liked the loo those years....
The 1990's are almost totally absent of this fun stuff but in the 2000's we had Nanana, Rimi rimi ley and Ninanajna... and then all of sudden in 2011 we are supposed to go boom, boom, ding dong and da da dam. Or even haba haba that apparently does mean something - but who understands that? All in one year. What happaened?