Love it or hate it: The onesie is definitely the biggest, bizarrest fashion statement of 2013.

Thanks in part to Miley Cyrus' infamous twerk video, the trend exploded in the celebri-verse this year -- with everyone from One Direction to Katy Perry to Beyonce proudly rocking them. Awhile it might not be the most chic trend, it's certainly the most comfortable.

So is this pajamas-as-regular-clothes trend an embarrassing fad or is it here to stay? Allow Chelsea to break it down for you in the latest episode of WTF!

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The list of celeb onesie lovers goes on... Justin Bieber, Ariana Grande, Perrie Edwards, Ed Sheeran... everybody who's anybody not only wears onesies, but seems to be proud to tweet, instagram and upload vids wearing them. Why are we so obsessed with an article of clothing that was previously only worn by little kids waiting for Santa?

Admittedly, the Hollywire team may own multiple One Direction onesies, so we've definitely hopped on the onesie bandwagon but that doesn't mean it's a fad we'll be proud of in 10 years.

But at least we're all in it together, right?

Real talk: What do you think of the onesie fad? And do you own one?