Meghan Trainor channeled her inner Mrs. Claus in LA Friday night, wearing a festive — and very sparkly — red dress, complete with white cuffs, when she took the stage at the iHeartRadio Jingle Ball at the Staples Center. The Nantucket native, who performed at the Boston leg of the annual holiday concert tour back in 2014, won’t be at this year’s concert at TD Garden on Dec. 11. Instead, guests can expect performances from Ariana Grande, Shawn Mendes, Diplo, Niall Horan, Ellie Goulding, and others.
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