Happy birthday song is from and it is sung by , and .It stars and in leading roles. This song is penned by and composed by . It is produced by Siddharth Roy Kapur. This song was released on 19 Jun 2015.

Party toh kabhi se shuri huyi hai
Par bhai..
Meri to entry nahi hui hai

Main, tu, mere yaar, tere friends
Teri girlfriend, teri ex
Teri girlfriend ka ex
Kyu ho gaye saare junglee
Kyu ho gaye saare junglee
Kyu ho gaye ho gaye, ho gaye, ho gaye
Ho gaye saarey junglee ikatthey

Aww.. tera happy birthday
Aww.. tera happy birthday
Aww.. tera happy birthday
Naach pajama pakad ke patthey

Aww.. tera happy bday
Aww.. tera happy bday
O aaj toh party jab tak fatte
Naach pajama pakad ke patthey

Ek hor saal purani ho gayi
Teri alhad jawani (alhad jawani)
Khudiyaan thi pehle ji, ab ho gayi
Teri auntiyan deewani
(Teri auntiyan deewani)

Ek hor saal puraani ho gayi
Teri alhad jawani (alhad jawani)
Khudiya thi pehle ji, ab ho gayi
Teri auntiyan deewani

Aww.. tera happy birthday
Aww.. tera happy birthday
Aww.. tera happy birthday
Naach pajama pakad ke patthe

Aww.. tera happy birthday
Aww.. tera happy birthday
O aaj toh party jab tak fatte
Naach pajama pakadke patthe

Birthday hai bhai birthday hai
Aaj terey bhai ka birthday hai
Oo candles bujh gayi
Ab sab mein cake batte hai

Chicks saari hot yahaan pe
Can saarey thande hai
Test khel liya poore saal
Aaj toh mera one day hai

Saare bolo, happy birthday!
Zor se bolo, happy birthday!
Aawaaz ni aayi, happy birthday

Thoda loud ho lo happy birthday!

Saare bolo, happy birthday!
O phir se bolo, happy birthday!
O happy birthday
Oye happy birthday

Aww.. kaayi zaala
Aww.. tu ja naam kaa hai?
Aww.. aaun chhu
Aww.. aww!

Tu chale mein chaloon
Tu rukke mein rukoon
Apne toh daily hai, naye naye hungaame

Tu girre mein thaame
Main giroon tu thaame
Apne toa daily hai, naye naye hungaame

Jo teri deal hai
Wo meri deal hai
With you o buddy
Mujhey aati yehi feel hai

Main, tu, mere sir, guru
Teri girlfriend, teri ex
Teri girlfriend ka ex
Hai ek thaali ke saare
Hain ek thaali ke saare
Hain ek thaali, ek thaali ke
Ek thaali ke chatte-batte

Aww.. tera happy b'day
Aww.. tera happy b'day
Aww.. tera happy b'day
Naach pajama pakad ke patthe

Aww.. tera happy b'day
Aww.. tera happy b'day
Aaj lagenge tujhpe satte
Naach pajama pakad ke patthe

One more saal puraani ho gayi
Teri allhadh jawaani
O just one more saal..
Khudiya thi pahele ji
Ab ho gayin teri auntiyan deewani
(auntiyan deewani)

Aww.. tera happy birthday
Aww.. tera happy birthday
Aww.. tera happy birthday
Naach pajama pakad ke patthey

Aww.. tera happy birthday
Aww.. tera happy birthday
Oye aaj toh party jab tak fattey
Naach pajama pakad ke patthey

Chalo! chalo! chalo!