Track listing
• UK & Europe CD single • "Best Friend" (Radio Version) – 3:28 • "Best Friend" (Maxi Version) – 4:11 • Scandinavia CD maxi-single, promo • "Best Friend" (Kaydee Vs. DJ NME) – 6:48 • "Best Friend" (Hampenberg Club Edit) – 5:25 • "Best Friend" (Elephant & Castle Mix) – 5:05 • "Best Friend" (The Poker Boys Toy-Mix Long Version) – 6:28 • Australia CD maxi-single • "Best Friend" (Radio Version) – 3:28 • "Best Friend" (Maxi Version) – 4:11 • "Best Friend" (The Poker Boys Toy-Mix Long Version) – 6:28 • "Best Friend" (The Poker Boys Toy-Mix Short Version) – 3:12 • "Best Friend" (Elephant & Castle Mix) – 5:05 • Germany CD maxi-single • "Best Friend" (Radio Version) – 3:28 • "Best Friend" (The Poker Boys Toy-Mix Long Version) – 6:28 • "Best Friend" (Elephant & Castle Mix) – 5:05 • UK Cassette, single • "Best Friend" (Radio Version) – 3:28 • "Best Friend" (The Poker Boys Toy-Mix Long Version) – 6:28 • "Best Friend" (Radio Version) – 3:28 • "Best Friend" (The Poker Boys Toy-Mix Long Version) – 6:28 ==Charts==