US President encouraged artists to take a stand against domestic violence
Dancer became internet sensation due to awkward moves during Perry's performance
Singer will perform ballad 'By The Grace Of God' with activist Brooke Axtelle
Singer joins previously announced acts including Madonna and Kanye West
Perry was joined by Missy Elliott during game between New England Patriots and Seattle Seahawks
Lenny Kravitz also took a guest spot
Pop star will become latest big name act to perform during iconic American football event
Perry will perform during game between New England Patriots and Seattle Seahawks on February 1
R&B group hope to raise funds for the release of final album
Singer will perform at annual american football event in February