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Justin Bieber’s surprise engagement has left Yahoo commenters wondering about Selena Gomez

There’s nothing casual about Justin Bieber’s new relationship status: engaged, just a month after he and Hailey Baldwin revived their on-again-off-again romance.

Bieber confirmed the engagement Monday on Instagram, writing: "My heart is COMPLETELY and FULLY YOURS and I will ALWAYS put you first. You are the love of my life Hailey Baldwin and I wouldn't want to spend it with anybody else."

The 24-year-old pop star shocked the entertainment world Saturday night when he proposed to 21-year-old Baldwin in front of a crowd in Baker’s Bay in the Bahamas, with a ring purchased weeks in advance. His hasty move has some Yahoo commenters wondering: “What happened to Selena Gomez?”

The duo dated six years ago and were rumored to be back together last October. Bieber’s proposal — and Selena’s lack of a response to it on social media — have fans dying to know what's up.

“I thought Bieber was in love with Selena Gomez last month?” one commenter wrote on Yahoo Entertainment’s original article. Another bet that the pop singer and actress wouldn’t take the news well: “I feel sad for Selena Gomez, since I’m sure she will feel hurt by this decision.”

But Gomez doesn’t seem too blue — she was enjoying a relaxing cruise around New York when the news broke. Her assistant, Theresa Mingus, posted a cute photo of the two of them lounging on Sunday.

What do you think? Is this another case of Ariana-and-Pete-style moving too fast? Is Selena really as cool as she seems? Let us know in the comments