The 2013 Grammy performers and presenters

The 55th Annual GRAMMY Awards will be held on GRAMMY Sunday, Feb. 10, 2013, at Staples Center in Los Angeles and once again will be broadcast live in high-definition TV and 5.1 surround sound on CBS from 8–11:30 p.m. (ET/PT).
Among performers are:Rihanna,Bruno Mars,Taylor Swift,FUN,Carrie Underwood,Justin Timberlake,Maroon 5,Frank Ocean and others.
Rihanna, Bruno Mars and Sting will be performing together at the 55th GRAMMY Awards. No other details were confirmed on the collaboration.
The full list:

Dierks Bentley and Miranda Lambert

The Black Keys

Kelly Clarkson

Fun.

Elton John and Ed Sheeran

The Lumineers

Maroon 5 and Alicia Keys

Bruno Mars, Rihanna and Sting

Mumford & Sons

Frank Ocean

Rihanna

Taylor Swift

Justin Timberlake

Carrie Underwood

Jack White

And the presenters:

Beyoncé

Kaley Cuoco

Ellen DeGeneres

Neil Patrick Harris

Hunter Hayes

Faith Hill

Carly Rae Jepsen

Jennifer Lopez

Tim McGraw

Pauley Perrette

Katy Perry

Keith Urban

Prince

The show will be again hosted by LL Cool J.
-I.