Oh come on, 'you already know.'

Billboard.com released its Song of Summer list. The list is based on a cumulative tally of tunes on the weekly Billboard Hot 100 chart from Memorial Day through Labor Day. Also factored in is the weekly Songs of the Summer chart, which this song topped every week.

And the winner is...'Fancy' by Iggy Azalea, featuring Charli XCX. 'Fancy' spent seven weeks at #1, and six weeks in the top five on the Hot 100 chart during the tracking period.

'Rude' by Magic! came in at #2, with 'Problem' by Ariana Grande featuring Iggy Azalea rounding off the top three.

Last summer's #1 song was 'Blurred Lines' by Robin Thicke featuring T.I. and Pharrell.

More From WBZN Old Town Maine