Lady Gaga was present at the 2014 Christmas Tree Lighting Ceremony held at the Rockefeller Center on Wednesday evening to perform Christmas songs with Tony Bennett.

The duo sang two songs at the event and videos have appeared online showing them singing a rendition of the classic song "Winter Wonderland" and also the Duke Ellington song "It Don't Mean A Thing (If It Ain't Got That Swing)."

The 28-year-old singer also tweeted a few times about the performances on her official Twitter account, and said, "It was truly a Winter Wonderland in New York."

During her performance, the "Born This Way" singer opted for a classical look instead of her usual crazy fashion choices.

Gaga wore a white ball gown for her performance with Bennett, with a deep V neckline and a matching fur hat on her head. She dolled herself up with metallic eye shadow that matched the silver shadow on her eyelids, and had crystals spread along the lash line, which completed her Christmas season look.

Other musical acts that appeared alongside Gaga and Bennett include Mariah Carey, Pentatonix, Cyndi Lauper and Prince Royce.

Videos of the performances are already online and nare available for fans to watch. The a capella group Pentatonix put their own spin on "Santa Clause Is Coming To Town." Lauper was joined by Billy Porter on stage for her version of "Home For The Holidays" and Royce rocked out on stage with "Jingle Bell Rock."

Carey performed "All I Want For Christmas Is You" to celebrate the 20th anniversary of her Christmas single.

While Gaga shines in her performance with Bennett, Carey seemed to struggle with her live performance.

Carey's performance was supposed to be pre-taped the day prior, but the songstress arrived three hours late to the event. The higher ups were reportedly furious at what happened, and instead gave the green light for Carey to perform it live instead. However, the singer ended up sounding pitchy and winded according to Direct Lyrics.