Until this summer, few people outside the R&B music scene knew who Robin Thicke was. Then came his new song "Blurred Lines" and an unrated online video to promote it."You the hottest b---- in this place!" Thicke sings, as topless models playfully dance around him.The video has stirred a debate, with detractors complaining that it's too racy and degrading to women.Thicke insists he meant no offense -- and the song, meanwhile, has become the No. 1 hit of the summer.