"Sam Smith and Lady Gaga were like, 'Look at you!' " Elvis Duran tells PEOPLE

By Aurelie Corinthios
Updated July 29, 2015 07:00 AM
Astrid Stawiarz/Getty

When Sam Smith and Lady Gaga want to talk about how great you look, you know you’re doing something right.

That was the case for longtime radio host Elvis Duran when he made his big reveal at the 2015 Grammy Awards in February after losing 100 lbs.

“Sam Smith and Lady Gaga were like, ‘Look at you!’ ” Duran tells PEOPLE. “And I’m like, ‘No, this is your night, let’s talk about you.’ It was great.”

The radio superstar of Elvis Duran and the Morning Show, who has hosted the popular, upbeat morning radio show on Z100 for over two decades, says after moving to New York City from New Jersey, his health “went down.”

“I bloated up and gained a ton of weight, and it wasn’t good,” says Duran, 50.

When Dr. Mehmet Oz, host of The Dr. Oz Show, was a guest on Duran’s radio show one day, he took Duran’s blood pressure.

“He had this look on his face, and he didn’t say anything on air,” Duran recalls. “He came up to me [off-air] and said, ‘I think you should go to the hospital,’ and I said, ‘Well, you’re Dr. Oz.’ ”

After several doctor visits and tests, Duran, his physician and Dr. Oz decided that Duran should get gastric bypass surgery.

“[Dr. Oz] told me, ‘If you have cancer in your body, you are going to do something about it. Obesity is as bad as cancer. Why would you not treat that?’ ” Duran says.

Though Duran admits the December 2014 bariatric sleeve surgery certainly wasn’t “the easy way out” and involved “a lot of blood being drawn, a lot of needles, [and] a lot of hospital visits,” he says it has changed his life.

“You do have to change the way you look at everything,” he says smiling. “You get full much quicker. It’s good. The problem is my clothes. My ass is saggy in the jeans now.”

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The radio host, whose show is currently number one in over 80 markets and attracts 7 million to 10 million listeners a week, spends his days cracking jokes and interviewing celebrities like Chris Pratt and Gaga – but that certainly wasn’t the case when he began his career as a teenager on a radio station in Texas, where he grew up.

“When I first started, I had a $50 giveaway, and no one called,” Duran says. “I realized no one was listening. At that point, I became very relaxed. So still to this day, I just assume no one’s listening.”

For more on Elvis Duran, pick up the latest issue of PEOPLE, on stands Friday