On December 21, Al Gore's internet erupted in celebration when word broke that R&B quartet B2K would be embarking on a nationwide reunion tour in 2019.

The "Girlfriend" singers will be joined by fellow early 2000s baes Lloyd, Chingy and Mario on The Millennium Tour.

As everyone rushes to prepare their best throwback fits to don when the tour rolls into their city, lead singer Omarion eased the process by posting an unofficial official guide on attire for the concert.

View this post on Instagram

From Ms Nicole – ????????. I would say come as you are! But if you feeling 2000’e – DRIP UP!!! Fan/ Fam club is almost 20 years plus! ???????? ayeeee

A post shared by ⚡️Omarion ⚡️ (@omarion) on Dec 26, 2018 at 8:32am PST

First of all, if you were born after the year 2000, keep scrolling. This isn't for you. Or as the post tactfully put it, "Stay yo young a** at home!"

For the fellas, dust off your Air Force 1s and get to searching for your throwback jerseys. Remember when y'all used to wear tall tees? For one night only, those too-big T-shirts will be making their long-awaited return.

Now for the ladies, jersey dresses are the main staple. Complete the look with Air Force 1s for the kicks. Don't forget the bubble coat with the fur hood.

Once you've glanced in the mirror and determined that your outfit meets the expectations, brush up on them B2K lyrics. According to the rules, it's a requirement that you know all the words to their songs. Not some, but the entire catalog.

The comments, naturally, co-signed the "Post to Be" singer and some even added their rules to the guide.

One user responded, "PERIODT! I’m coming thru with my bangles and big twist!"

"YOP!!!!! All of that!!!!!!!!!!!" someone else enthusiastically replied.

"No fashion nova lol. Lets do this for lil saint!!" a commenter joked.

Others bypassed the rules entirely and just submitted their song requests:

"All I know is y’all better perform Shorty and B2K is Hot!"

"I WANT TO HEAR THE PANDEMONIUM ALBUM UP AND DOWN!!!"

Now that y'all have been briefed, your search to find the best ensemble can officially commence.

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