Although there's many people who probably believe that there's a million reasons to ban Bieber and Perry from our TV screens this particular move comes after the two appeared in a 'misleading' advert.
The advert is for skin care brand Proactiv (you know the ones!) which feature the stars talking about how the brand saved their skin from spots. However the adverts have now been banned in the UK because the two talk about ingredients that aren't featured in the British version of the product.
Another one of Proactiv's adverts that you may have seen before is the one starring Made in Chelsea's Gabriella Ellis. Sadly this one hasn't been banned because it was made featuring the right information.