Jessica's Simpson's husband Nick Lachey has allegedly "vanished" while his wife is in Africa - further fueling rumours the pair's marriage is on the rocks. The handsome star, who shot to fame in popular MTV show 'Newlyweds', was last seen by friends two weeks ago at sister-in-law Ashlee Simpson's album launch party in Los Angeles.

Jessica is currently on safari in Kenya with her father Joe and personal assistant Cacee Cobb. The date of the 'Dukes of Hazzard' beauty's trip to Africa - which also involved a visit to Nairobi so Jessica could promote her charity Operation Smile, a fund set-up for children born with cleft lips - meant the pair spent their third wedding anniversary apart last month. However, Nick's representative insists the star is simply abroad working on his new record. The spokesperson told America's New York Daily News newspaper: "He is out of the country recording his album."

Rumours have been rife in recent months the couple are on the verge of splitting after a series of reports suggesting the pair have been arguing and living virtually separate lives. But Jessica's dad hit back at the claims, saying: "They're still together. They just had an anniversary vacation. It doesn't sound like a divorce to me."