The 'What Makes You Beautiful' singers got ready to head across the UK on tour with a special performance at Watford.

 One Direction geared up for their first headlining UK tour last night with a warm-up performance at Watford's Colosseum. The 'Gotta Be You' singers gave their first solo concert performance on Sunday (18th December) where they sang hits from their recent debut album 'Up All Night'. "Couple of hours to showtime, nerves settin in now," Niall Horan tweeted before the event. "Gettin in the zone, gameface! let's go watford #1Dtour." The show also saw the five-piece band invite three female fans on stage during a rendition of album track 'I Want', during which the boys donned tuxedo suits. "Watford what can I say you were amazing! Thank you soo much! Hope u enjoyed yourselves! Coz we did! Much love xxxx" Niall added after the performance. One Direction will officially kick off their 'Up All Night' UK tour on Wednesday (21st December) with a show at Wolverhampton's Civic Hall.

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