By Stephen M. Silverman
Updated August 20, 2002 01:00 PM

Wannabe astronaut Lance Bass has until Friday to put up and blast off, or shut up and stay home, the Russian Space Agency has essentially told him. The Associated Press reports that the ‘N Sync singer, 23, was informed Monday that he has five days to meet his financial obligation if he is to leave on the Oct. 28 mission to the International Space Station. Bass is training for the trip at Russia’s Star City, outside Moscow. Konstantin Kreidenko, a spokesman for the agency, vowed to the AP that if the check doesn’t arrive by the Friday deadline, all bets on Bass are off. The tariff for such a “space tourist trip” is said to be about $20 million, which Bass’s backer, Los Angeles-based TV producer David Krieff, claims is in the bag. Krieff, who’s planning a reality series about Bass’s voyage, says he has lined up three sponsors, who have committed between $5 million and $15 million each. Earlier this month, when the demands for payment starting growing louder, Krieff told Reuters: “We are meeting and have met every obligation, and we will continue to meet every obligation, of our contract. The problems … started on their side because of big mouths, (but) that’s another situation.”