La'Porsha Renae and Trent Harmon Bring 'American Idol' Judges to Tears as Adam Lambert Returns to the Show

La'Porsha Renae capped off an an emotional night on Thursday's American Idol.

The fan favorite brought down the house, closing the show with a rendition of Mary J. Blige's "No More Drama." After giving all that she had, Renae started crying, causing the judges to get just as emotional as she was.

In fact, the song made Lopez openly weep as she praised the singer for being "an inspiration," and she once gave thanks for another memorable Idol moment.

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That wasn't the only performance that left Lopez misty-eyed. Renae's fellow contestant, Trent Harmon, delivered a powerful rendition of Lynyrd Skynyrd's "Simple Man," using the soulful song to show off his impressive vocal range.

"It's moments like this [that remind me] why I love Idol and why I'm going to miss it so much," she said, choking back tears as she referenced the show’s current and final 15th season. "It's been having this front seat to watching the perfect song and the perfect singer sing it at that time."

"That's what happened there, and it made me feel like, 'Damn, I've been so lucky the five years I got to be on the show and watch things like that,'" Lopez added. "You sang that song so beautifully, and I felt every single word of it. Thank you for giving me one of those moments."

Lopez's emotional response overwhelmed Harmon a bit, causing him to also be on the verge of tears.

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Judge Harry Connick, Jr. was also impressed, suggesting that Harmon should share the stage with the night's guest of honor, Idol alum Adam Lambert.

"You know what would be really fun? To hear a duet between Trent and Adam Lambert," Connick, Jr. offered after the impressive performance. "There would be, like, glasses breaking everywhere. It would be crazy."

"It would be a dream come true," Harmon replied.

Lambert opened the episode with a stunning rendition of "Mad World," before hitting the stage again during the second half of the show (with an outfit change, of course!) to debut his new single, "Welcome to the Show."

Even Lambert knew that his vocal gymnastics and incredible stage presence made for one show-stopping performance, and he could hardly contain his excitement afterwards.

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"That was the first time!" the Idol alum, who was rocking fingerless gloves and a white jacket over a black T-shirt and jeans, told host Ryan Seacrest. "Oh my god, I got such a rush from that!"

"You did such a good job! I think the judges would give you a golden ticket," Seacrest quipped.

Even though Lambert commanded the stage in his Idol return, it was impossible not to notice the woman who joined him for the incredible performance.

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That other powerhouse was Laleh Pourakim, a Swedish singer-songwriter who helped Lambert write his single. Her retro-futuristic style and dominant stage presence brought an intangible force to the bombastic performance.

"Laleh wrote an incredible [song]. She's an amazing songwriter," Lambert, 34, gushed after their duet. "I met her through my friends in Sweden, and she's so talented. We just wrote a banger, and I'm so pumped!"

WATCH: Kelly Clarkson Brings 'American Idol' Judges to Tears With Emotional Performance of 'Piece by Piece'

Check out the video below for a look at Renae's stunning cover of The Beatles' "Come Together" that left the judges in awe during last week’s episode.

'American Idol': Jennifer Lopez Gushes Over Frontrunner La'Porsha Renae's Flawless Beatles Cover

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