: Critics categorized the song under the "4G" (Go Goa Gone) genre—a style known for addictive beats, unconventional singing, and "over-the-top" voice programming that emphasizes fun over traditional vocal clarity.
While the song was criticized by some for its lack of a strong central melody, its status as a "hip and happening" dance track has secured its place as a modern alternative to the traditional American "Happy Birthday to You" tune within the Indian diaspora. : Critics categorized the song under the "4G"
: Written by Mayur Puri, the lyrics are characterized by their "insanity and quirkiness". It includes humorous, tongue-in-cheek lines such as "dance holding your pyjama bottoms" and playful "aww" sound effects that contributed to its "annoyingly catchy" nature. Role in the Film and Reception It includes humorous, tongue-in-cheek lines such as "dance
The track features a collaborative vocal performance by and D.Soldierz , with lead actor Varun Dhawan making his debut as a rapper. In the context of ABCD 2 , a
: The music video features lead actors Varun Dhawan and Shraddha Kapoor performing hip-hop choreography, which helped the track become a "chartbuster" upon its release.
In the context of ABCD 2 , a dance-centric film directed by Remo D'Souza, "Happy Birthday" provides an essential party number that complements the film's "young at heart" energy.
: The song's international appeal was highlighted in 2024 when American actress Sofia Vergara used the track in a viral Instagram post to wish a friend a happy birthday, sparking a "frenzy" among Indian fans.