Teenage heartthrob, Justin Bieber, has a bit of a problem when it comes to differentiating the kids of a few well-known celebrities.

While it may be deemed as an innocent mistake, mistaking David and Victoria Beckham's son over the famous "Brangelina's" kid is one hell of a hilarious slip-up. Instead of handing out a gift meant for Romeo Beckham, Justin handed out a gift signed out for Pax instead.

Being beat up to a bloody pulp for the April issue of Complex must have had a few memory-altering effects on Justin Bieber's brain. Apparently, the 18-year old singer mixed up his autographed gifts for Pax Jolie-Pitt and Romeo Beckham. In an interview with Victoria Beckham in the April issue of Vogue, the mother of three explains the exact details.

"For Romeo's birthday, as a surprise, the family took him to hang out in Justin Bieber's studio while he was recording his Christmas album. Bieber sweetly sent the boys signed guitars afterward, but Romeo's was signed to 'Pax' So we got one of the Jolie-Pitts' guitars," explains Victoria to which she jokingly adds, "Such are the perils of the dailymail.co.uk celebrity lifestyle."

Angelina Jolie, the mother of Pax, still has not spoken up on the crazy mix-up but sure enough she'd be laughing and joking about Bieber's slip-up.

There has also been no comment from the singing sensation, Justin Bieber. Given his situation where he's diligently working on his next album, "Believe", then fans would understand why he had made such an erroneous mistake but heck no one's mad about it plus it did make Victoria Beckham laugh.

With a lot of Hollywood celebrity kids popping out here and there asking for Justin's autographed guitars plus hoards of female fans craving for his attention, it really isn't questionable as to why Justin had two famous kids mixed up.

Yet, if Justin had only paid attention to their surnames then maybe he wouldn't have gotten the autographed gifts all mixed up. Thankfully, David's kid isn't one to throw tantrums at receiving an autographed guitar that has a different name written on it.