A LITTLE SNUG...Alejandro Fernández might be hot s*** with his music -- but after this video ... some seem to think he might not be bringing the heat down below, at least that's the vibe online anyway.
The Latin Grammy-winning singer sparked some unfortunate chatter after rocking a tight pair of leather pants for his performance at the La Onda Music Festival in Napa Valley over the weekend -- and it all has to do with a noticeable imprint around his crotch area.
Gallery Alejandro Fernández Performance Pics Launch Gallery GettyAF thrusts his hips forward while jamming on stage -- giving fans an unexpected glimpse at the outline of his junk ... and like we said, some don't seem to be that impressed.
Of course, it didn't take long for the bulge to go viral ... with over 2 million people tuning into the TikTok and over 15,000 people sounding off in the comments. While some fans joked about being scarred by the footage, others playfully poked fun, joking "he can't have it all."
Another fan chimed in with ... "Napa valley at winery.. where you find tiny grapes 🍇."
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