Owl City, whose twee electro-pop hit “Fireflies” is one of the hottest songs of the year, will continue spreading his gooey sweetness into 2010 with a spring tour that starts March 30 in Boise, Idaho.
 
But first, OC, who is really just Adam Young, will play Europe and Australia (the latter with Cobra Starship) and heading a tour in January.
 
Between now and then, "Fireflies" will undoubtedly continue to sell like crazy. The single has surpassed the 2 million sales mark.

And Young will be looking over his shoulder for Ke$ha. As Owl City peformed "Fireflies" Monday night in Houston, Ke$ha -- who was also on the bill -- jumped on stage with two bandmates, dressed as fireflies and flitted around the stage, according to Idolator. We have it all captured below for your viewing pleasure.

Here are Owl City's tour dates:

March   30th         Knitting Factory                                                Boise, ID
                31st         Knitting Factory                                                Spokane, WA
April      1st           Paramount Theater                                        Seattle, WA
                3rd           Roseland Theater                                            Portland, OR
                5th           Fillmore                                                               San Francisco, CA
                6th           Fillmore                                                               San Francisco, CA
                7th           Fox Theater                                                        Pomona, CA
                8th           Soma                                                                     San Diego, CA
                9th           Club Nokia                                                          Los Angeles, CA
                10th         Marquee                                                             Phoenix, AZ
                12th         Salt Air                                                                 Salt Lake City, UT
                13th         Ogden                                                                  Denver, CO
                15th         Stubbs                                                                  Austin, TX
                17th         Nokia Theater                                                   Dallas, TX
                19th         War Memorial                                                   Nashville, TN
                20th         Tabernacle                                                         Atlanta, GA
                22nd        DAR Hall                                                              Washington, D.C.
                23rd         House of Blues                                                 Boston, MA
                24th         Terminal 5                                                          New York, NY
                25th         Electric Factory                                                 Philadelphia, PA
                28th         House of Blues                                                 Cleveland, OH
                29th         Royal Oak                                                            Detroit, MI
                30th         Riviera Theatre                                                 Chicago, IL
May       1st           State Theater                                                    Minneapolis, MN
                2nd          Eagle Ballroom                                            Milwaukee, WI