The iconic Canadian songstress served as a mentor for Team Gwen for the first time on Monday's The Voice, and the former No Doubt frontwoman marveled at the opportunity to learn from her idol.
"I have the real Celine Dion right here! I'm so honored to have you here, it's unbelievable how many people love you," Stefani gushed. "I'm here to learn from you today."
One of the things the Voice coach appreciates about Dion is the way her music has affected people, and the true scope of its influence across the globe.
"Her music speaks to the world and transcends all these language barriers," Stefani said in a solo interview. "It's just incredible to be around someone that's been able to touch so many people. She really is a phenomenon."
As excited as Stefani was, the members of Team Gwen were even more dumbfounded by singing in Dion's presence.
Hopeful JChosen, who joined Team Gwen after delivering a performance during the blind auditions that got all four coaches to turn their chairs, was particularly nervous to show his skills in front of Dion and Stefani together.
"The most nerve-wracking thing about this is singing in front of these legends," he admitted. "It's intimidating."
"What I like about The Voice is that I get to be stunned by amazing talents," Dion shared. "This is the new generation, so we really have to take responsibility as mentors to give them some tools."
One tool Dion gave was some tips on crowd control. Taking the mic during the mentoring session, she performed some moves that showed her famous stage presence.
"Intimidate the crowd," she advised. "Get close."
She also advised the performers to keep their eyes on the crowd, even breaking out a sultry little dance to pull their focus up. "I tried so hard to get undressed for you to look at us!" Dion joked. "But honestly, you did an amazing job."
After the show was done, the "My Heart Will Go On" singer shared her appreciation for Stefani on Twitter, writing, "I love working with you @gwenstefani! We have so much fun together!
Recently, Stefani opened up to Seth Meyers on Late Night about Dion's participation in the show, and how she's "the ultimate person that you would want to be on there." Check out the video below to hear more.