Credit: Britney Spears on Twitter

Today is the day, people! Fire up your Britney Spears Spotify playlist and bust out your cutest crop top, because tonight marks the first performance of the pop superstar’s two-year Las Vegas residency! Just hours before the first show, BritBrit gave us a peek at her final dress rehearsal — and damn does she look good!

In the one of two pics posted to Twitter, we get a more relaxed Britney, decked out in practical yoga pants and a sporty tee — and a huge grin. She’s laying down in the shape of a number one, the final part of the seven day countdown.

Credit: Britney Spears on Twitter

“I've got chills. Last dress rehearsal for friends and family before opening night tmw. #1DayTillShowtime,” she captions. We’re amped too, girl!

Britney seems motivated and in great spirits, which is a sure sign that we’re in for a killer show from this iconic star. And anyone who caught at least a few minutes of her I Am Britney Jean documentary on E! earlier this week can attest that the “Work B*tch” singer is back in fine dancing form and working with some seriously great choreography.

In a sexier photo from our Godney (above), the 32-year-old shows off her killer figure in a mid-performance snap — complete with those trademark abs! “Can't believe the 1st show is almost here!!! #PieceOfMe,” the star writes. With that fedora, we feel like we’re back in 2003’s In the Zone era. Wonder if this is her “Me Against the Music” look?

Looks like it’s time to start saving up for a Vegas trip!

Do these pics get you excited for Britney’s residency? Weight in in the comments below!