Rudimental will also perform at ceremony, which takes place in February
Singer posted the so-called 'G-Mix' on Twitter
The US pop star will provide the entertainment during next year's event
Bruno Mars, Green Day release new albums
'Grenade' singer's rep says US news network made up 'false' claims about him
Singer was caught with the drug in September 2010
Singer shrugs off rapper's verbal attack
Singer was caught with drug last September in Las Vegas