Kelly Osbourne: I'm not in 5SOS!

Kelly Osbourne got mistaken for a teen boyband member while out at dinner.

The 30-year-old TV presenter is known for her unmistakable style, which includes a cropped head of lavender coloured hair.

Despite this iconic look, someone recently confused her with 5 Seconds of Summer's Michael Clifford, who turned 19 today.

"Last night at dinner I got mistaken for @Michael5SOS! I mean... how? Im not only a girl but Im 5'2 #B***hStoleMyLook #MadeMyNight #hilarious (sic)," she confessed on Twitter.

Luckily, Kelly seemed to take the confusion in her stride. Her followers also responded with humour, suggesting she take it as a compliment and that they are both "fabulous".

Michael failed to respond to her tweet, but that could be because he's too busy celebrating his birthday. And his famous friend, Niall Horan from boyband One Direction, is helping him fete the special occasion.

"It's @Michael5SOS birthday today! Wohooo ! Happy birthday brother ! Looking forward to seeing you this week (sic)," he wrote to his pal, with Michael responding with a little smiley with hearts for eyes.

"Party time (sic)," he simply updated his own page.

Michael and 5 Seconds of Summer bandmates Calum Hood, Ashton Irwin and Luke Hemmings grew close to Niall, Harry Styles, Zayn Malik, Liam Payne and Louis Tomlinson when they supported One Direction during their Take Me Home and Where We Are tours.

Luke, 18, also took to Twitter to congratulate his bandmate.

"It's michaels birthday soon :0 what a guy, bring out the dancing lobsters (sic)," he wrote.