Latin Grammys 2018

Blake Shelton is Blown Away Watching Gwen Stefani Rehearse For Her Las Vegas Residency

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Gwen Stefani and Blake Shelton arrive at the 2016 Vanity Fair Oscar Party Hosted by Graydon Carter at the Wallis Annenberg Center for the Performing Arts on Feb. 28, 2016 in Beverly Hills, Calif.

Gwen Stefani has been grinding away at this music thing for a minute. More than 30 years to be exact. And even though they've been dating for more than three years she keeps finding new ways to surprise boyfriend Blake Shelton. Take, for instance, the set list for her upcoming Las Vegas residency. The 48 year-old singer is slated to kick off her 25-date "Gwen Stefani -- I'm Just a Girl" run at the Zappos Theater at Planet Hollywood Resort and Casino on June 27 and just as she's in full-on rehearsal mode Shelton tweeted out a sweet update on Thursday (June 14) about how things are going.

"Setting here watching @gwenstefani rehearsals it continues to shock me the amount of GIANT hits this girl has written," he wrote, without revealing exactly what fans can expect to hear during the show. And, being the dutiful beau, Shelton added, "I highly recommend y'all catch her Vegas show if you can get tickets!!!"

A few hours later Stefani finally saw Shelton's tweet and dubbed him the @Bestboyfriendever.

Last week Stefani told ET that she kind of freaking out about the upcoming career retrospective show. "I’m still in the panic mode of rehearsals. It feels like it’s not going to happen, but it will happen and it’s going to be one of those things that I look back on and go, 'That was a huge chapter of my life,'" she shared. "So, I’m very excited, I’m very honored," she said. "I feel like it’s the kind of show that I’d never be able to do until this point in my life. [The show is] nostalgic, bringing people through the long journey I’ve been on with music and sharing that and exchanging the love I have with people," she added. "It’s really just that same journey again, but in a new Vegas-y way.”