No, this one's not all in your head: Fifth Harmony really are bringing in their bikini-clad best for a little seaside moment on the set of the video for 7/27 song (and, presumably, soon-to-be-single?) "All In My Head (Flex)," featuring Fetty Wap.

The quintet was caught filming their latest video in Long Beach on Tuesday (May 17), where they were spotted writhing around in their swimsuits on the rocks and in the sand — as one does at the beach, generally.

The upcoming reggae-tinged track, which the group co-wrote according to an Instagram posted by Dinah Jane during the 7/27 track listing unveiling, promises to be one of those "feel-good songs that you can't help but jam to," according to Dinah.

"Imma need you to BUMP THIS ONE hella loud when you're out and about! lol The overall Melody is so memorable you'll find yourself singing it everywhere you go, ESPECIALLY with Fetty Wap's ridiculously, amazing catchy tunes! Lyrically it's FUN & FLIRTY, so don't take it serious because remember it's all in your head! wink wink," Dinah wrote.

Check out the first photos from the set of "All In My Head (Flex)" below. T-minus one week until 7/27 finally arrives, Harmonizers. Stay strong.

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