The 'America's Got Talent' host ' who is married to Mariah Carey ' has sent out a mass email asking corporate sponsors to pay for his 30th birthday bashes in New York and Los Angeles next month.

Boasting that confirmed guests include Beyonce Knowles and her husband Jay-Z, Demi Moore and her husband Ashton Kutcher, Will Smith and Jamie Foxx, the actor has promised any companies who assist with the celebrations ' which are to be hosted by his wife ' will receive tweets and exclusive photographs in recognition of their donation.

The email ' sent by the star's representatives and obtained by the New York Post newspaper ' said: 'This is an extremely exciting opportunity to sponsor a fun and lavish event. opportunities range from gift bags and signage to tweets and photo ops.'

In return for a $2,500 donation, sponsors will feature in the gift bag, while a more generous $15,000 will guarantee 'one tweet', plus a 'mention in all public relations materials'.

Additionally, those prepared to fork out the full $25,000 will earn the donator the official title of 'host sponsor', which includes 'three tweets', a 'right to service out photos' and a 'logo on all collateral'.

The couple are well-known for their love of lavish parties.

To celebrate his wife's 39th birthday, Nick whisked Mariah ' who is worth an estimated $400 million ' off to the Caribbean island of Barbados for an exclusive celebration.