Harry Styles kicked off his Valentine's Day in Nando's with fans before clubbing until 4am.The 19-year-old singer surprised fans when he was spotted dining in the fast-food restaurant before meeting up with old friends for a boozy night.It's meant to be the most romantic day of the year, but on Thursday (14.02.13) the One Direction heart-throb, who recently split from Taylor Swift, was happy to pose for pictures with adoring girls at the chicken joint where he was enjoying a break from the band's tour rehearsals in Leeds.After moving onto a private party in the city's university hall of residence, he was again mobbed by fans wanting a photo with their idol.One student tweeted: "Best Valentine's Ever."The 'Little Things' hitmaker continued to party with friends at Mezz nightclub, where they enjoyed £1 shots of tequila and sambucca until around 4am.A source said: "Harry was getting totally mobbed but he still seemed to be having a great time."He didn't mind posing for pictures but spent time away from the main club in the VIP area. Some girls were pleading with him to let them join him."While the star was taking his mind off his break-up, one clubber revealed the DJ couldn't resist teasing him about his ex by playing her song 'I Knew You Were Trouble'.