If you're going to get tips on spittin' some bars from anyone, it may as well be from Missy Elliott.

The hip-hop star and her fellow musician Busta Rhymes appear in a new Super Bowl ad for Doritos, each coaching actors Morgan Freeman and Peter Dinklage as they prepare to do battle.

Of course, Dinklage is no stranger to the music business having fronted his own punk band in the past - but rapping, on the other hand, is another thing.

See how they got on below: