Usher, Katy Perry, B.o.B And More: Who Has The Song Of The Summer?

Lady Gaga and 3OH!3 and Ke$ha are also in MTV News' 2010 summer-jam race — who gets your vote?

With Memorial Day weekend just around the corner, it's finally time to get summer started properly.

But perhaps more important than the baseball games, barbecues, pool parties and beach trips that will pepper the next few warm-weather months is the singular song that will provide the soundtrack to all those events. It's time to choose the official summer jam of 2010, and we're leaving it up to you.

There isn't a lot of science that goes into a great summer song, but you certainly know it when you hear it. It has to be catchy, bright, fun and sound great cranked way, way up in a car with the windows rolled down. Think Rihanna's "Umbrella" (the jam of 2007), Nelly's "Hot in Herre" (2002), Pras' "Ghetto Supastar" (1998) or the Black Eyed Peas' "I Gotta Feeling" (2009's entry).

For summer 2010, there are five strong nominees that we think are the front-runners for the title. All week, MTV News will be laying out the case for each, and we'll be throwing the vote to you. At the end of the week, we will have crowned a summer jam that you can play at maximum volume during whatever long-weekend activity you have planned and comfortably call it summertime.

Our five nominees are: [artist id="3061469"]Lady Gaga[/artist]'s "Alejandro," [artist id="3238990"]B.o.B[/artist]'s "Airplanes" (featuring Eminem and Hayley Williams), [artist id="3068464"]3OH!3[/artist] and [artist id="3213641"]Ke$ha[/artist]'s "First Kiss," [artist id="1270"]Usher[/artist]'s "OMG" and [artist id="3274550"]Katy Perry[/artist]'s "California Gurls" (featuring Snoop Dogg). Stay tuned to MTV News and the MTV Newsroom blog for much more on these five jams. So pick out your favorite swimsuit, slather on some SPF 30 and get voting, because it's time for summer jams!

Which of our five nominees do you think deserves the title? Vote in our Summer Songs Poll, and sound off in the comments!