Charli XCX, One Direction, Meghan Trainor, and Fergie will perform at the Billboard Hollywood Party on the evening of Dec. 31. Fergie will also host the So-Cal festivities for the ninth straight year, which will be broadcast as part of ABC's New Year's Eve telecast.

Most of the performers will be celebrating new albums along with the new year. Charli XCX’s hotly-anticipated sophomore LP Sucker will only be a few weeks old on New Year’s (it drops Dec. 12), One Direction’s Four drops Nov. 17, and Meghan Trainor’s major label debut, Title, will be out a couple weeks later on Jan. 13.

All this promo Charli's been doing

Hopefully they'll have swept Break The Rules under the rug and moved on to the next single by then.

Yes Charli and Meghan, PROMOTE your flawless music

Meghan, YAS! Get that year end pre-orders and single sales

Meghan her promo is on pointe! She will have an Xmas single on Dec. As well JingleBell and Macys Parade promo!

Hope Meghan performs Dear Future 3rd Single there.

Looks cool.