But her incredible vocals weren't the only thing to catch the eye of viewers, with many taking to Twitter to discuss Lady Gaga's outfit, too.
The 34-year-old arrived wearing a black, high neck dress, which featured a huge ruffled red skirt. But it was Gaga's large gold pin - on the front of her dress - that viewers couldn't stop talking about, with many comparing it to a mockingjay from The Hunger Games! Take a look for yourself...
Taking to Twitter, one person wrote: "Lady Gaga came with big Hunger Games energy".
While another said: "Big fan of @ladygaga's outfit this morning, it gave me Hunger Games vibes for sure."
"Can we also talk about Lady Gaga's brooch??? Did anyone else get Hunger Game vibes from it or am I crazy," added another.
And one tweeted: "Lady Gaga was up there dressed like it's the Hunger Games."
Lady Gaga was up there dressed like its the Hunger Games
- RoRo (@melaninbarbyy) January 20, 2021
PICTURED: Lady Gaga performing at this year's Hunger Games pic.twitter.com/8WaDgs8RJo
- Matt Rain (@Matt_Rain) January 20, 2021
"Ladies and Gentlemen may the 2021th Hunger Games Begin, and may the odds be in your favour!" #LadyGaga #BidenInauguration pic.twitter.com/Rb9N9wi9eu
- Renata Morús (@revelatoria) January 20, 2021
Can we also talk about Lady Gaga's brooch??? Did anyone else get Hunger Game vibes from it or am I crazy
- :smiling_imp:Stearns (@The_Stearns) January 20, 2021
Lady Gaga is giving me full-on Hunger Games vibes.
- JaysonDBradley (@jaysondbradley) January 20, 2021
As many social media users pointed out, the beautiful pin is actually a golden dove holding out an olive branch, which symbolises peace.
"Lady Gaga's golden dove with the olive branch symbolising peace. Her whole way of making the song her own. It means so much," one viewer added.
Meanwhile, another viewer even tweeted to say Lady Gaga''s appearance had brought them to tears.
"Your performance was beautiful! The dove with an olive branch, red white and blue and the flags - you brought tears of joy to me," they tweeted.