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Pharrell Williams, Mariah Carey and more: Artists that heated up the TODAY summer concert series

Singer Pharrell Williams
Singer Pharrell Williams performs on NBC's \"Today\" show in New York June 5, 2014. REUTERS/Lucas Jackson (UNITED STATES - Tags: ENTERTAINMENT)LUCAS JACKSON / Reuters

Take a look at hot artists like Ariana Grande, Maroon 5, 5 Seconds of Summer, Austin Mahone and Mariah Carey, all of whom performed their hits live on the plaza for the 2014 Toyota Concert Series.