One Direction

The teen craze unleashed by this 'X Factor'-winning London quintet arrives this month with a macro concert in Barcelona's Olympic Stadium. Niall Horan, Zayn Malik, Liam Payne, Louis Tomlinson and Harry Styles are the hottest boy band of the minute, but despite their youth, the lads have already released three studio albums: 'Up All Night' (2011), 'Take Me Home' (2012) and 'Midnight Memories' (2013). Parents, bring your tissues and earplugs, as your tweenie girls are sure to be crying and screaming during this stop on One Direction's 'Where We Are' tour.