2016, a statement year. Trendy and newly debuted girl groups delivered hits left and right. Year-end Digital Chart: #01. TWICE - CHEER UP #03. GFriend - Rough #12. Mamamoo - You're The Best #16. TWICE - Like OOH-AHH #26. TWICE - TT #27. GFriend - Me gustas tu #29. GFriend - NAVILLERA #32. BLACKPINK - Whistle #38. Red Velvet - Russian Roulette #47. I.O.I. - Very Very Very #70. Mamamoo - Decalcomanie #71. BLACKPINK - Playing With Fire #80. Mamamoo - I Miss You #84. Lovelyz - Ah-Choo Mamamoo, Red Velvet and Lovelyz were in their 2nd-3rd year TWICE and GFriend were in their 1st-2nd year BLACKPINK and I.O.I were in their debut year My question is this -- If the 4th generation is already here, why is there no significant shift in hierarchy? The top 1-4 girl groups right now are still all 3rd gen groups. Is it possible that 4th gen is not here yet and only coming this year or the next?