What does this mean, guys? Justin Bieber and Selena Gomez had fans talking after they exchanged a few subtle words via Instagram last week, and this week, it looks as though the pair is back at it again.

On Thursday, March 24, Gomez, 23, posted a throwback photo of herself sitting at a piano bench wearing nothing but a pair of colorful, striped bikini bottoms and a matching, ruffled top.

“tb to a sweet, small house in TX,” she captioned the sun-lit shot.

Bieber, 22, “liked” the post, just as the “Hands to Myself” singer had “liked” his throwback post of the pair kissing just last week.

tb to a sweet, small house in TX

A photo posted by Selena Gomez (@selenagomez) on

The exes' sweet Instagram exchange comes just one day after Gomez was spotted at her former flame’s concert at Los Angeles’ Staples Center.

Eagle-eyed fans spotted the pop songstress in the sound-mixing area during Bieber’s Purpose World Tour and excitedly snapped away on their phones.

On Saturday, March 26, Bieber upped his Instagram game once more with a stunning shot of himself standing butt naked before an expansive lake.

Dat ass doe @johnny photo cred

A photo posted by Justin Bieber (@justinbieber) on

“Dat ass doe @johnny photo cred,” he captioned the shot, in which he shows off his bum set against a gorgeous backdrop of nature. (The pop star caused a stir on social media last July when he posted a similar shot to his Instagram.)

Gomez has yet to respond to his latest photo.

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