"If We Ever Meet Again " adalah lagu dari produser asal Amerika Serikat Timbaland . Lagu ini dirilis pada tanggal 1 Desember 2009, sebagai single keempat dari album studio ketiganya Shock Value II (2009). Lagu ini menampilkan penyanyi Katy Perry dan menjadi single kedua album tersebut di seluruh dunia. Saudara laki-laki Timbaland, Sebastian, juga memiliki vokal yang tidak dikreditkan di akhir lagu. "If We Ever Meet Again" mencapai nomor satu di Republik Ceko dan Selandia Baru dan menduduki peringkat 10 besar di Australia, Austria, Belgia, Kanada, Prancis, Jerman, Irlandia, Israel, Italia, Norwegia, Polandia, Slovakia, Spanyol, Swiss dan Inggris. Lagu ini kemudian dimasukkan dalam edisi deluxe album studio ketiga Perry, Teenage Dream .
"If We Ever Meet Again" (international radio edit) – 3:58
"If We Ever Meet Again" (Digital Dog radio remix) – 3:35
"If We Ever Meet Again" (international radio edit) – 3:58
"If We Ever Meet Again" (Digital Dog radio remix) – 3:26
"If We Ever Meet Again" (Chew Fu Deja fix) – 5:07
"If We Ever Meet Again" (Starsmith remix) – 5:21
"If We Ever Meet Again" (radio edit) – 3:58
"If We Ever Meet Again" (album version) – 4:53
"If We Ever Meet Again" (instrumental) – 4:21
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