Digital downloads of Ke$ha's "Tik Tok" totaled a whopping 610,000 for the week ending December 27th. It's the highest total downloads in one week of a song by a female artist since 2003, when such tracking began. It's also the second highest weekly download total ever behind Flo Rida's "Right Round", which was dowloaded 646k times in late February 2009. The old mark for a female was set a year ago this week by Lady Gaga's "Just Dance".