Kesha’s debut hit “Tik Tok” sold an impressive 610,000 copies last week making it the biggest selling single week of a song ever by a female artist. It only comes 26,000 copies short of the all time record holder, Flo Rida’s smash “Right Round.” Avid chart watchers will also realize that Kesha appeared with supporting vocals on “Right Round” as well. The previous top mark for a female artist was the high water mark of Lady Gaga’s first hit “Just Dance,” which sold 419,000 copies in one week.