She shouldn't get nervous - there will only be 800 million people watching...

Mariah Carey is to sing the US National Anthem at next year’s SUPERBOWL.

The star will join a long line of vocalists who have performed the anthem at the biggest sporting event in the US, which is broadcast around the world. Traditionally the event draws a massive television audience, with an estimated 130 million in the US, and 800 million fans watching the event worldwide.

Other musicians who have sung the anthem include Diana Ross, Neil Diamond, Billy Joel, Backstreet Boys, Cher and the U2.

This year’s event takes place at the Louisiana Superdome on February 3. [a][/a] are also confirmed to perform live at the event.