Filmmaker James Cameron, comedian Jerry Seinfeld, hip-hop mogul Jay-Z and disgraced golfer Tiger Woods have all been tipped to become billionaires by 2015 in a new Forbes magazine survey. The big businessmen have made the respected publication`s list of 15 top entrepreneurs who are expected to up their net worth to break into the Forbes 400 - the countdown of the richest people in America.

TV star Seinfeld is thought to be worth $800 million, while Forbes estimates Cameron is worth $650 million and Woods $500 million. Jay-Z`s portfolio of music, clothing and sports investments places him at $450 million.

Others expected to be billionaires in the next five years include movie mogul Jerry Bruckheimer ($850 million), retired basketball icon Michael Jordan ($500 million) and director Tyler Perry ($350 million). Microsoft boss Bill Gates remains America`s richest man with $54 billion in the bank, followed by investor Warren Buffett with $45 billion.
sections: Celebrities