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"We wanted a song that feels like summer in America," MLB's Steven Tyler tells Billboard of the song choice.

Mac Miller performs on the Camp Stage during day 1 of Camp Flog Gnaw Carnival 2017 at Exposition Park on Oct. 28, 2017, in Los Angeles.

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Baseball is America’s pastime, and the MLB is celebrating the U.S.’s 250th anniversary with a For the People campaign surrounding the country’s birthday, which will find all 30 teams in action on Saturday (July 4) and Sunday (July 5).