Zayn Malik and Perrie Edwards can't stay away from each other. The One Direction singer has reportedly taken four transatlantic flights in five days to spend a few hours with his girlfriend Perrie Edwards. Zayn Malik is currently on tour with One Direction in the US.

Perrie, who is a singer in the UK girl group Little Mix, is one lucky lady.

A source told The Sun: "Zayn has been missing Perrie as One Direction tour the US. At the end of last month he secretly flew from Boston to the UK to see Perrie, then from the UK to New York two days later."

"The next day he returned from the Big Apple to London before having to head back to the States," they added.

One Direction, the insanely popular boy band, is currently on the North American leg of their "Take Me Home" world tour. The boys will head to Australia next. One Direction will release its third studio album later this year, and will embark on another world tour in April 2014, HollywoodLife.com reports.

Looks like Zayn and Perrie have a lot of relationship hurdles to jump ahead of them in their long-distance relationship.

But their relationship has been growing more serious, proven by Zayn's recent tattoo of a cartoon version of Perrie on his arm.

Perrie recently admitted that she was surprised by her boyfriend's tat, and called it "weird."