Hit-makers Rihanna, Calvin Harris, deadmau5, and more are pooling their star power for a good cause-a charity concert for the Children's Hospital Los Angeles on February 12 at the House of Blues on the Sunset Strip.

All proceeds will go directly toward the hospitals children's orthopedic center and Mark Tape-Johnny Mercer artists program. Tickets are $1,000 each, and with all of the stars out and about for the Grammy Awards taking place the same night, it is sure to be a sellout.

Rihanna is doing double duty by performing at both events, set to sing 'We Found Love,' with Calvin Harris at the charity concert and then join Coldplay on the Grammy stage for their duet 'Princess of China.'

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