Demi Lovato recently opened up about how she's feeling before her Super Bowl performance Sunday.

The singer, 27, will perform the national anthem for millions across the country, fulfilling a dream she tweeted about in 2010. "One day, I'm gonna sing the national anthem at a super bowl. Onnnee dayyy...." she wrote at the time.

Lovato discussed her nerves before the big performance and how it compares to her performance at the Grammys last weekend in an interview with Andy Cohen on SiriusXM's Radio Andy on Thursday.

She said she is more nervous to hit the stage Sunday than she was for the award show.

"I've spent more time with that song, 'Anyone.' I've spent more time listening to it. I crafted it," she said about the emotional song she performed at the Grammys. "So when you put your heart and soul into something, it takes on a different life of its own. Whereas the national anthem, if I mess up, everyone goes after you if you do."

"I'm not going to read the comments, so it won't matter," she added with a smile. "But it's just one of those things where it's like -- there's so much pressure on the national anthem. When it's my song, if I mess up a lyric, nobody would've known because it wasn't out yet."

She also told Cohen a little about the outfit she is wearing for her performance. "I wanted to be sophisticated but also chic, and I also really wanted it to be respectable and classy," she shared. "You got to know your audience."

During the interview she also spoke about how her future in music was uncertain at one point.

Her appearance at the Grammys -- when she performed "Anyone" for the first time -- was her first major public performance since her 2018 overdose.

Some of the lyrics to the hearbreaking ballad include: "Anyone, please send me anyone. Lord, is there anyone? I need someone."

"Well that song, I knew that it represented that period in my life when everything hit the fan," Lovato told Cohen.

"I thought, ‘I’ve never had a moment like this, you know, where I’ve sat down at a piano or that I’ve stood next to a piano and sang my heart out. I’ve never had one of those moments on an awards show, and I thought, ‘you know, if I ever come back from this’ -- because I was still in the hospital and I didn’t know -- and I thought, ‘if I ever come back from this, if I end up going back to music and I’m on stage and I get a first performance, I want it to be at the Grammys and I want it to be this song,'" she continued.

She said that she might be able to open about more about the difficult period in her life in time.

"I think as time goes on, I’ll be able to give more information or more details and things like that, but just in a general, it was a general thought," she said on not returning to music. "We didn’t know what was going to happen. We didn’t know how healthy I’d be when I left, it was a scary time in my life for sure."