Katy Perry, Leona Lewis and LL Cool J are to take part in the Grammy Celebration Concert tour.
The five-date tour will open at the Hollywood Palladium on April 9th with a performance from Lewis.
Perry will top the bill at The Fillmore in Miami Beach on May 13th, while LL Cool J will conclude the trip in New York on May 28th.
Other acts scheduled to take part in the tour will be announced shortly.
Tickets for the Grammy Celebration will be available exclusively via select T-Mobile stores.
Katy Perry live
You can keep up to date with all the latest news from Gigwise by following us on Twitter and liking us on Facebook.

BBC Denies Burying Jimmy Saville Sex Abuse
Katy Perry Unveils New Single 'Part Of Me' - Listen
Plan B's 'iLL Manors' Movie Labelled As 'Horrific'
Adele Gets Go-Ahead To Perform At Grammy Awards
Katy Perry And Russell Divorce: The Shortest Marriages In Music
Katy Perry To Keep £28 Million Fortune In Russell Brand Divorce
The 15 Best B-Sides Of All Time
M.I.A Demands Women In Burkas: Ridiculous Rock Star Riders!
Dry The River, All The Young Play Manchester Ritz