Looks like T-ara's Hyomin wasn't the only one to leave a birthday message affection for SNSD's Sunny on her 21st birthday on May 15th. f(x)'s Amber also left a birthday message for Sunny even though it was a belated one. Amber posted her belated birthday message with a picture on May 16th at 12.04am through her me2day, "Everyone~ do you know what day today is? Although a few minutes has passed, but that (day) is Sunny's unnie birthday!!" She continued with her long message, "Unnie, sorry for this belated message. You know how much I love you right? Hehe, My Su Su Su Su Sunny unnie!! Happy Birthday!! Hope that you have been receiving blessings all this time! Although late, I hope everyone can congratulate her too..." Netizens commented, "It's so nice of Amber to remember Sunny's birthday," "They look good together", "Amber has so much boyish charm", etc.