Pop star Rihanna has employed an unidentified flying object (Ufo) watcher for 24-hour updates on extraterrestrial activity, according to a report.

The Umbrella hitmaker is reportedly convinced aliens will land on Earth and she is now paying a helper to keep an eye on possible incidents in the skies above the Mojave Desert in Nevada.

A source tells Britain's Daily Star, "Rihanna has always been convinced aliens will land on Earth in her lifetime. So she started using the man, who calls himself a sky scanner, to give her information from Nevada on anything that relates to sightings.

"He keeps in touch with her from the Little A'Le'Inn, a motel which hosts Ufo hunters. It's also near one of the world's most secret government bases, Area 51. This isn't a fad for Rihanna, she is a total believer and doesn't mind spending her money on it to get results."

The star was reportedly introduced to spaceship-spotting as child by her father Ronald Fenty in Barbados.