This summer has been jam-packed with comebacks from all the biggest stars in K-Pop.

But can you remember back to when you first heard them?

So many of our favorite idol groups made a lasting first impression with their debut singles and here is a sampling of some of those songs.

Give them a spin and reminisce!

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Big Bang - "We Belong Together" (2006) First Single

Girls' Generation - "Into the New World" (2007) Girls' Generation

B2ST - "Bad Girl" (2009) Beast is B2ST

2NE1 - "Fire" (2009) 2NE1

SHINee - "Replay" (2008) Replay

4Minute - "Hot Issue" (2009) For Muzik

CNBLUE - "I'm a Loner" (2010) Bluetory **

SISTAR - "Push Push" (2010) So Cool

B.A.P - "Warrior" (2012) Warrior

f(x) - "La Cha Ta" (2009) Hot Summer

Super Junior - "Twins (Knock Out)" (2005) SuperJunior05 (Twins)

SECRET - "I Want You Back" (2009) [Non-album Release]

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** CNBLUE already had been active for some time when "I'm a Loner" was released, but the single marked their official Korean debut.