Lollipop (with 2NE1) (2009)

"Lollipop" is less a song than a candy-coated time capsule of late-2000s K-pop, a BIGBANG and 2NE1 collaboration that began as a phone commercial jingle and became a cultural earworm. The production is pure electro-bubblegum: squelchy synths, an irresistibly silly hook, and a hyperactive bounce that screams 2009. There's almost no emotional depth by design — this is pop as confection, all sugar rush and playful flirtation, the title functioning as cheerful innuendo. What makes it compelling is the personality on display: G-Dragon and T.O.P trade cocky verses, CL and the 2NE1 girls answer with bratty charisma, and the whole thing crackles with the chemistry of two YG rosters at the start of their imperial runs. The vocal performances are more about attitude than technique — everyone playing a heightened cartoon version of themselves. Culturally this is a landmark: it introduced 2NE1 to the public and captured the gaudy, neon, tech-sponsored optimism of Korea's pre-smartphone moment. Listening now, it's nostalgia incarnate, a snapshot of when K-pop was loosening up and learning to be deliriously fun. Best enjoyed without irony at a party, or alone when you want a jolt of pure, uncomplicated 2000s joy — silly, infectious, and utterly of its era.