Back up dancer 'Left Shark' became internet sensation after Perry's Super Bowl performance
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
The performance will take place at the University Of Phoenix Stadium in Arizona on February 1
A new commercial shows Perry preparing fire-breathing shark and unicorn for appearance
Singer says she won't pay to play the prestigious TV slot
Singer says: 'If the Illuminati exist, I want to be invited'
The singer told the director in charge of the production she's interested in playing lead character Cher
The hip-hoppers say 'Dark Horse' lifts from their track 'Joyful Noise'
Offer follows recent meeting at a signing session for Clinton's new book 'Hard Choices'
Singer's first signing is pop artist Ferras
More than 65,000 people had signed petition claiming that video was offensive to Muslims