Dedrick is just not a fan of these famous claims.
In E! News' exclusive sneak peek at the July 24 episode of Claim to Fame, Dedrick and fellow contestant Naomi have an awkward run-in at breakfast after she greets him as Mr. Jackson, a nod to the apparent clue he dropped during conversation the night before.
It's a greeting that truly takes Dedrick off guard.
"Why would you call me Mr. Jackson?" he says during a confessional. "Johnson, maybe. I think I look more like The Rock. Don't you?"
However, according to Dedrick, there were even more guesses that took him by surprise.
"Whatever you just called me is f--king better than Little Richard," he tells Naomi, referring to Adam's previous guess of his celeb relative. "I don't want to f--king be called Little Richard man. You ever seen that brother? Call me Jay-Z before that."
And though this admission earned laughter from his housemates, Adam couldn't help but reflect on why Dedrick would be so offended.
"He reacted in a very strange and awkward way," Adam shares in a confessional. "Either you really don't like the person or it is your celebrity relative."
But it didn't stop there.
"Y'all call me Little Richard," Dedrick says at the breakfast table, "Y'all couldn't say Idris Elba or something." Referring to Adam, he continued, "He gets called goodlooking people."
But for Adam, the defensive moment just further proves his hunch.
"No doubt in my mind this guy is Little Richard," Adam says. "We got the piano, I think he's the godfather of Rock n' Roll. However, I've been wrong in every category so far. I don't even know what planet I'm on to be honest with you."
Find out more when Claim to Fame airs on Wednesday nights at 9/8 p.m. on ABC.
Until then, keep reading to get to know the season 3 cast.
Bianca: Eliminated Week 1
During the season three premiere, Bianca was revealed to be the niece of longtime Good Morning America anchor Robin Roberts.
Gracie Lou: Eliminated Week 2
Gracie Lou, whose real name is just Gracie, tried to convince her competitors she was from Tennessee, but was ultimately uncovered to be Jon Cryer's niece.
Jill: Eliminated Week 2
Jill was revealed to be the niece of Full House star John Stamos.
Miguel (Rapheal): Eliminated Week 3
Miguel, whose real name is actually Raphael Curtis, is the newphew of Oscar-winning Halloween star Jamie Lee Curtis.
Naomi: Eliminated Week 4
After previously hinting her relative was a "Brat Pack princess," it was revealed Naomi's aunt is '80s film icon Molly Ringwald.
Dedrick: Eliminated Week 5
Dedrick's real name turned out to be Sigmund Jackson, the same birth name as his father and Jackson 5 alum Jackie Jackson, older brother of the late King of Pop Michael Jackson.
Danny: Eliminated Week 6
After previously teasing his relative has a Grammy, Danny was revealed to be Marc Anthony's nephew during his week six elimination.
Shane: Came in 4th Place
During the first half of the two-part season three finale, Mackenzie correctly guessed that Shane's relative was Oscar winner Marlon Brando. Shane called the late actor his grandfather.
Mackenzie: Lost During FInale
Mackenzie came this close to winning, but Adam correctly guessed her relative was Trace Adkins, who is her father.
Hud: Lost During FInale
After Mackenzie's elimination, Adam chose to guess Hud's relative and he got it right! Hud is the son of singer John Mellencamp and the brother of Real Housewives of Beverly Hills alum Teddi Mellencamp.
Adam: Winner
Adam outlasted everyone and took home the $100,000 prize. It was also revealed he's the nephew of Michael Bolton.