Guilherme “Bomba” Vasconcelos — an MMA fighter who competed in the UFC and Bellator, and dated Demi Lovato — died by suicide, according to newly-released documents.

TMZ Sports obtained the case report from the October 15 incident … which state cops were dispatched to an Illinois home around 9 AM after a woman reported finding Vasconcelos in the garage.

After reviewing security camera footage … cops determined Vasconcelos took his own life the night prior around 11:45 PM — and was not discovered until the following morning.

Over the course of his MMA career … Vasconcelos racked up a record of 10-6. He and Lovato were first spotted together in 2017 during New Year’s Eve festivities after several months of dating.

Guilherme’s uncle, Walter, mourned the loss of his nephew at the time … saying, “We were looking forward to your visit for Christmas, which will no longer happen. Life is fleeting, and we woke up to this devastating news. What a time we live in.”

RIP

Justin Bieber was getting snapped and then he snapped … unloading on a paparazzi for saying something the pop star felt was disrespectful.

Ya gotta see the heated interaction between Justin and a photog … with the Biebs snapping at the guy, set off by the dude saying “Thank you.”

Justin asks the photog — who is not a TMZ cameraman — why he’s thanking him … and explains why it’s disrespectful to do so.

Bieber was heading back to his SUV with Hailey Bieber after grabbing breakfast at Beverly Glen Deli in Los Angeles … and paps were waiting for him.

Justin told the guy to stick to taking pictures and letting him do his thing … with no need to thank JB for anything.

We don’t usually see this kind of reaction from Justin … so it’s pretty interesting.

George Clooney is stunned to see you on this mighty fine Saturday, so please take it easy on him … Can you track down George’s minor mishaps? No need to get cold feet, you’ve got this!

Earlier this week in NYC, good ole’ George made his way through the cones and stopped by “The Late Show With Stephen Colbert” and discussed his new Broadway play, “Good Night and Good Luck.” The two photos may be a bit sticky, but we’ve got confidence in your skills!

Ready Set Go!