The ex-boyfriend whose behavior made singer Adele's life "a misery" may have just jumped to the top of the line of all-time rudesters. 

Unable to ignore the international success of his former girlfriend, the cad now claims that he deserves a share of the income from her first album.  His reasoning?  Since her songs of heartbreak were undoubtedly inspired by his bad-boyfriend behavior, she owes him payment for his valuable contributions to her success.  Naturally, we think, "How rude is that?" -- but, at least this time we're confident Adele's getting her much-deserved last laugh.

Bonus: click here to read about Adele and 13 other artists who got their revenge on the ones that done them wrong with big hit singles.