The warm-weather months of the 2000s apparently had people feeling a bit lascivious, if the tunes that topped Billboard's Songs of the Summer chart that decade are any indication. Sure, there were the romantic declarations of love thanks to Beyonce's "Crazy in Love" featuring then boyfriend and now husband Jay-Z, and Mariah Carey's yearning "We Belong Together."
But to borrow a line from Nelly, "it's gettin' hot in here"! His lusty 2003 hit "Hot in Herre" off sophomore album Nellyville was one of several sexy tunes to become Billboard's Song of the Summer that decade. Usher's "Confessions Part II," about admitting bad behavior including cheating and getting a mistress pregnant, and Nelly Furtado's playful "Promiscuous" featuring Timbaland also earned the honor.