See Carrie Underwood's Return to the Grand Ole Opry Stage

Carrie Underwood returned to the stage Tuesday night for the first time since the birth of her baby boy a little over three months ago, but she had another landmark moment on her mind when she greeted the full house at the Grand Ole Opry.

Tom Arnold Loses a Full 100 Lbs. – and Isn't Afraid to Go Shirtless

Tom Arnold beamed with pride when he told PEOPLE in January that the birth of his son inspired him to lose 89 lbs. But secretly he was gunning to lose 100 lbs. in total, bringing him down to 187 lbs., a goal he’s thrilled to have finally reached.

Tom Arnold Works to Maintain Weight Loss 'Every Day'

Tom Arnold lost 89 lbs. last year by changing his diet and exercising, but continuing to keep a healthy lifestyle is a difficult task he faces each day.

“Every day I’m working at it. It can be challenging and some days I do better than others,” Arnold, 54, told PEOPLE at DirecTV’s annual Celebrity Beach Bowl football game in New York City on Saturday.

Tom Arnold Reveals How He Lost 89 Lbs.

It’s a feat Tom Arnold is proud to announce: “I can tuck my shirt in!”

That’s because the 6’2” actor no longer has to hide his belly after losing 89 lbs. since the birth of his son Jax last April.

“Something inside of me changed,” Arnold, 54, tells PEOPLE about becoming a dad. “I knew I needed to live as long as I could.”

Over the years, Arnold weighed as much as 287 lbs. after struggling with depression and overeating.

Denise Richards & Richie Sambora's 'Very Happy' (and First Class) Flight

Accompanying her beau Richie Sambora, a presenter at Nashville’s CMT Awards, Denise Richards boarded an American Airlines flight late Tuesday morning.

The couple sat in first class, across the aisle from comedian Tom Arnold, another presenter at the show.

Tom Arnold Ties the Knot Again!

The fourth time just might be the charm for Tom Arnold, who wed Ashley Groussman in an intimate ceremony on Saturday in Maui, PEOPLE has confirmed.

More than 75 family and friends attended the ceremony at Shep and Renee Gordon’s home, including actor Dax Shepard, who served as Arnold’s best man. Andrea Groussman was the maid of honor and designed the couple’s rings.

Tom Arnold Reveals Sexual Abuse in Childhood

To portray a child molester in a movie is a risky career move for any actor. But for comic actor Tom Arnold, 49, accepting the role as Alex in the new movie Gardens of the Night was more than a role: It was his attempt to finally put his own past as a sexually abused child behind him.

From ages 4 to 7, while growing up in Ottumwa, Iowa, Arnold says he was sexually abused by a 19-year-old male babysitter. He opens up about the experience in an interview with PEOPLE:

Tom Arnold's Divorce Finalized

Tom Arnold’s divorce from his wife, Shelby Roos, was finalized Tuesday after six years of marriage, Los Angeles court documents show.

Arnold, 48, and Roos, 35, separated in August 2006, but the actor’s rep told PEOPLE at the time that they might reconcile. And they did: Five months later, Arnold asked the court to dismiss his petition for separation. But in May, the actor filed for divorce.

Carlin Remembered: He Helped Other Comics with Drug Problems

Despite his gruff stage persona, offstage the late George Carlin was a gentleman who showed kindness to strangers and offered a hand to others hoping to beat addiction problems, Tom Arnold and other comics tell PEOPLE – while Jerry Seinfeld and Joan Rivers are expressing their appreciation of their unsentimental friend.

Tom Arnold, Wife Shelby Roos to Divorce

Tom Arnold filed for divorce from his wife, Shelby Roos, on Monday after nearly five years of marriage.

Arnold cites irreconcilable differences and states that the date of separation is “to be determined,” according papers filed at Los Angeles Superior Court and obtained by, which first reported the story.