British classical performer Sarah Brightman has recently completed medical checks in Russia for her imminent tour into space, while Ashton Kutcher may have to wait longer for his own space tour.

"It can happen," Alexei Krasnov, head of manned space missions at the Russian space agency Roscosmos, said Tuesday, acknowledging that Brightman may become the eighth fare-paying space tourist.

So far, only seven personalities have flown to space for a price tag within the $20 million to $35 million range. One of them, Charles Simonyi (Microsoft Office), has flown twice.

In March, British billionaire Richard Branson announced that Ashton Kutcher, 34, has signed up to be the 500th space tourist on his Virgin Galactic airlines. Kutcher's tour is a lot less expensive - estimated at only $200,000 per ride.

In contrast, Brightman, 52, signed up for a part in a space mission.

Dennis Anthony Tito, an Italian American engineer with Wilshire Associates is the first space tourist to fund his own out-of-Earth trip. He reportedly spent $20 million for his trip lasting 7 days, 22 hours, and 4 minutes.

The Daily Mail reported that Brightman will undergo necessary training for the space mission. She is "likely to fly to the International Space Station in 2015," the report said.

Brightman's space mission is an uncanny progress in the singer's life. Daily Mail recalled that the singer recorded with Hot Gossip the song "I Lost My Heart to a Starship Trooper" in 1978. The single peaked at number six in the pop charts.

So far, only high-profile investors have flown into space. Between Ashton Kutcher and Sarah Brightman, who would be the first celebrity to play astronauts in real life?