Ever since Ariana Grande traded dyed red hair (the trademark of the character she played on Nickelodeon’s Victorious and Sam & Cat) for a high ponytail and a microphone, Mariah Carey comparisons have been rampant. True, both singers have some serious multioctave pipes, but with every move, Grande is setting herself apart from the elusive chanteuse. Grande’s second album, My Everything, as well as her features on songs like Jessie J’s “Bang Bang” and Cashmere Cat’s “Adore,” move away from the throwback R&B that marked her debut, Yours Truly, and into EDM and electro-pop territory. Her chameleon-like ability to fit into each genre will make her one to watch for years to come. With Rixton. KeyArena, 305 Harrison St., 684-7200, keyarena.com. 7:30 p.m. $25.50 and up. All ages. ACP