It may be hard to believe it, with the leaves barely turning colors and the chillier weather just now hitting the coast, but Christmas is less than 100 days away. Yes, the holiday season is basically upon us now, and it wouldn't be anything without the music. Today (Oct. 9), one of the season's biggest events, Jingle Ball, has announced its initial lineup, and it's all about the big acts. Taylor Swift, 5 Seconds of Summer, Ariana Grande, Demi Lovato and more will all be performing in Los Angeles and Minneapolis.

Jingle Ball 2014 has announced the lineups for two of its first two concerts, according to Billboard. Swift, Grande and 5SOS lead the L.A. lineup, which will take place on Dec. 5. The will also be joined by Pharrell Williams, Sam Smith, Iggy Azalea, Meghan Trainor, Charli XCX, Jessie J, Rita Ora, Becky G, Rixton, Shawn Mendes and Kiesza.

The lineup remains largely the same for the NYC show, according to Z100. Swift, Pharrell, Grande, Azalea, Trainor, Mendes, 5SOS, Smith, XCX and J will also be joined by Maroon 5, OneRepublic and Calvin Harris.

Grande, Azalea, Trainor, Ora, J, Kiesza, Mendes, OneRepublic and G will all be continuing the Jingle Ball tour in Minneapolis on Dec. 8, but they will also be joined by Demi Lovato and Nico & Vinz.

Nick Jonas will be hosting the events.

With a lineup like this, it's hard not to see some major musical collaborations to warm your heart and body (from all that dancing) this December. Can you say "Problem," "Fancy," "Black Widow" and "Bang Bang?" 'Cause it's coming.

Further Jingle Ball lineup announcements from the shows in New York, Philadelphia, Boston, Chicago and Washington, D.C., are forthcoming.

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