Lady Gaga is turning to a team of astrologers ahead of her world tour - as she is "worried" her stars aren't aligned.

The pop songstress is gearing up for her Born This Way Ball global tour, which begins on April 27 in Seoul before making its way to Europe.

Gaga is said to have consulted spiritual experts before hitting the road, for fears her wrongly-aligned stars won't serve in her favour.

"Gaga is worried as she wants the stars to be aligned when she hits the road. She follows her horoscopes closely and has been looking ahead for when she's away," a source told British newspaper The Sun.

Astrologers have revealed that Mercury travels backwards through the sky around three times a year, and will occur half way through Gaga's tour dates.

The 26-year-old singer consulted horoscope experts to put her mind at ease.

"She's a typical Aries outgoing with a sense of adventure," the source added.

"But when she found out Mercury is likely to go retrograde, she wasn't happy and has been talking it through with her spiritual team."