Speaking of reputations in need of rehab, Lopez was often thought of as a demanding diva before her first season, but the J.Lo we see on the show is sweet and very generous with all the Idol hopefuls. Below, he shows off that charm while imitating his fellow judges. Plus, LevineвЂ™s pre- Voice reputation as a rock-and-roll playboy was certainly helped out by the show, where we get to see how funny and charming he can be. As the only two judges who have appeared on every season, they hold the panel together, mostly due to their playful rivalry (Levine has the second-most Voice wins with two) and genuine affection for each other. Just like Idol wouldnвЂ™t have been the same without the Simon-Paula dynamic (come to think of it, it isnвЂ™t), the same could be said for The Voice and the bromantic duo of the Maroon 5 frontman and Shelton. Check out one of their trademark squabbles below and watch the sometimes punching bag stand her ground like so few of the judges sitting next to him have been willing to do. More importantly, she wasnвЂ™t afraid to disagree with Cowell. And we might never have seen Cowell smile if it werenвЂ™t for his brother-sister antics with Abdul. Her genuine love for all the contestants was the perfect contrast to CowellвЂ™s grumpy realism. Part of the appeal of early Simon Cowell was tied to his dynamic with the loopy onetime pop star.

Her criticisms might have been beside the point, but her presence was not. For a lesson from the School of Harry, click below The New Orleans musician also wasnвЂ™t afraid to bring out some Cowell-esque harshness when it was needed, but his lighthearted rapport with the other judges and fatherly love for the singers kept him from coming off too mean. Also check out the clip below where Tonight Show host Jimmy Fallon begrudgingly calls Shelton the best Voice coach ever - and he doesnвЂ™t disagree.Д¬onnick is the closest thing to a music expert any of these shows has ever had, and he made it his mission as the rookie Idol judge this year to educate the contestants, his fellow judges and America in all things musical theory.

Now, they know him as the guy who has stacked up the most wins on The Voice (heвЂ™s coached three champs, not to mention three runners-up), and they also know about his charming sense of humor (just watch his lip-sync battle with Stefani from last week). He called Carrie UnderwoodвЂs success from her first audition and even made the bold (and 100 percent accurate) statement that she would go on to outsell every American Idol winner.Д«efore The Voice, most people either knew of Blake as a country singer or didnвЂ™t know him at all. But more importantly, he knew when someone was great almost instantly and was able to sway viewers to vote his way. First, no one dropped a better insult than he did - and they were almost always deserved. Was there ever any doubt? There are so many reasons for putting Cowell up top, but the two biggest are illustrated in the videos below. We also left out The Sing Off, since it features such a specific style of singing, but obviously Ben Folds would have been pretty high on the list.

shows that have more than one season (sorry, Rising Star and The Next) and are on a major network. *A few housekeeping notes: We only included the three U.S. It remains to be seen where Gwen and Pharrell will fall in the history of singing-contest judges, but before their debut, letвЂ™s rank all 26 personalities who have come before them.

The voice judges