Anthony Joshua had a special guest at the New York leg of his three city media tour, which the British superstar took part in to promote the rematch with IBF, IBO, WBA, WBO heavyweight champion Andy Ruiz.
On June 1, Ruiz dropped Joshua four times to secure a seventh round stoppage and captured the unified crown at Madison Square Garden in New York City.
The rematch is scheduled for December 7th in Saudi Arabia.
Briggs, a former world champion himself, gave words of inspiration to Joshua.
At one period in his life, Briggs was down on his luck, mentally depressed and very overweight.
He cut the weight, rebuilt his body, returned to the ring at an advanced age, and won his next nine fights - with eight of the wins by knockout.
During his entire comeback, Briggs would excessively shout what became his well-known catchphrase - "let's go champ."
Those words now inspire Joshua.
"Shannon Briggs talks about the times he was down and out, and nobody believed in him. That's where 'let's go champ' comes into my life right now," Joshua said to Sky Sports.
Joshua, who suffered his first career defeat, must bounce back to reclaim his top status in the sport.
"People say, 'you lost your titles'. I say, 'to lose something is to never get it back'. It's a great mindset to have and you can't lose that," Joshua said.
"The minute you lose it, you've got to retire. You've got to be hungry. I had a blip. We go again. I'm not shy. No fear. Ruiz Jr is calm but he can fight. He is not a fake character who puts on a persona. Sometimes the ones who are calm and chilled can bark back, and can definitely fight."