Meghan Trainor Can't Smile Because of Excessive Botox

Meghan Trainor should be singing "My Way," because when it comes to Botox regrets, she's had a few.

Meghan's worst fear these days is to take a pic and have the photo say, "Smile!!!" ... because she can't -- too much Botox.

The 30-year-old singer said on her "Workin' On It with Meghan Trainor & Ryan Trainor" podcast, “I got too much Botox and I need help. I messed up. I've had Botox, like, a handful of times … just my forehead.”

Well, not exactly ... she also confessed she's had filler on her upper lip ... “Someone convinced me with my little lips that if you did a lip flip, you put filler right above your upper lip, that you could have a beautiful flip on your upper lip, and I could have one for the first time in my whole 30 years of living — it was not true.”

She showed people the current limits to her smile ... it ain't big, that's for sure. She says it actually hurts to smile.