Pop singer, Katy Perry on Thursday 29 January teased a lion, sharks and at least some live singing during her Super Bowl half-time performance, the most-watched dozen minutes annually on US television. Perry opened her remarks with a small dig at the New England Patriots who have been accused of ball tampering in the AFC Championship game.

"I don't think I'm so much of an expert on the game of football, but I can assure everyone in here, nothing in my performance will be deflated."

The "Roar" singer wouldn't divulge much about her Sunday gig at the NFL title game but did say to expect an unnamed "old school" female singer as a surprise performer in addition to rocker Lenny Kravitz.

"I think I'm going to play on my strengths, which are humour, incredible joy. ... I just hope at the end of the day that over 100 million people are smiling in unison," Perry told a news conference at the Phoenix Convention Center.

The 30-year-old pop star, known for her colourful costumes and songs about female empowerment give a bit of a hint as to what Super Bowl fans will see.

"I think what I bring is just some light-heartedness. I will tell you that I am probably the only person in Super Bowl history that will bring a lion and sharks to a show"

Perry will perform her hits at University of Phoenix Stadium in Glendale, Arizona, at the Super Bowl match-up of the New England Patriots and the Seattle Seahawks.

"I've been designing this show for months. It's a larger than life show. I've collaborated on everything. There is not a diamond on a shoe that has not gone past my eyes. As far as colouring goes, every costume, I sit there for approvals in a seat and every hair, we do makeup tests. I'm so prepared for this show that I even had time for Netflix the other night," Perry said.