Niall Horan is back with his ex-girlfriend Barbara Palvin.

The One Direction star - who split from the Victoria's Secret model in February after three months of dating - took the brunette beauty on a date to watch American boyband 5 Seconds Of Summer at London's Shepherd's Bush Empire on Tuesday night (04.03.14).

A source told The Sun newspaper: ''Being either a working model or performer is incredibly difficult on a relationship. In either job you won't be in one place for more than a few days at a time. Add to that the fact Barbara lives in America and Niall's base is in London and you've got a logistical nightmare.''

The couple went public with their romance at the 'X Factor' wrap party in December and they celebrated New Year's Eve together at a local pub in Hertfordshire, before splitting up ahead of Valentine's Day, but insiders claims Niall finds Barbara's personality irresistible.

The source added: ''Barbara's a lovely girl, though. She's completely down to earth and not vain at all, which is what Niall finds so appealing.''

Now the couple are planning to spend time together before Niall gets ready to embark on a grueling stadium tour with Harry Styles, Zayn Malik, Liam Payne and Louis Tomlinson.