Guess the celebrity abs

Mike “The Situation” Sorrentino of “Jersey Shore”  (Photo by Jemal Countess/Staff)

Hint: This swimmer’s abs go for the gold.  (Photo by Antony Dickson/Staff)

Michael Phelps  (Photo by Antony Dickson/Staff)

Hint: This star spent his younger years being saved by the bell.  (Photo by Barry King/Contributor)

Mario Lopez  (Photo by Barry King/Contributor)

Hint: This star’s abs excuse all his confessions.  (Photo by Kevin Mazur/Contributor)

Usher  (Photo by Kevin Mazur/Contributor)

Hint: This actor is known as the karate kid.  (Photo by ChinaFotoPress/Contributor)

Jaden Smith  (Photo by ChinaFotoPress/Contributor)

Hint: Everyone has trouble keeping up with this starlet’s family.  (Photo by Stefanie Keenan/Contributor)

Kim Kardashian  (Photo by Stefanie Keenan/Contributor)

Hint: This singer leaves no doubt about her fitness.  (Photo by Kevin Winter/Getty Images)

Gwen Stefani  (Photo by Kevin Winter/Getty Images)