A/N: Italic words are thoughts.   SNSD Concert Taeyeon receive an invitation one day requesting her presence at a SNSD Concert.   Taeyeon has no idea what this means or who sent the invitation. She even questioned her members, wondering was it some kind of prank.   .......   FLASHBACK FEW DAYS AGO   "Hello, Taeyeon-appa, Taeyeon-eomma." Tiffany bowed as the elders smiled at her.   "Hello to you too, Tiffany. How are you?" Tiffany grinned at his question.   "I've been a little busy but it's still manageable. Are you looking for Taetae?" Tiffany asked as the two elders shook their head.   "Well, you see. We haven't seen Taeyeon for quite some time now..." Taeyeon's eomma started as Tiffany nodded her head but stayed silent, knowing that there's more to her words.   "So.. We were thinking if it was possible for us to meet her at the concert that will be held soon?" Taeyeon's appa continued eomma's sentence.   "Taetae will be so happy to see the both of you!" Tiffany squealed and smiled her signature eye smile causing the elders to laughed.   "Mmhmm. Can you help us to keep this secret from Taeyeon? You can tell the other girls as well but just keep it from Taeyeon." Taeyeon's eomma said as Tiffany nodded her head in understanding.   "Oh, we were planning to send her this invitation." Taeyeon's appa passed her the invitation as Tiffany's eyes widen in surprised before laughing.   "Taeyeon-appa, Taeyeon-eomma. Don't mind me but the invitation makes it sound like some stalker." The two elders laughed at Tiffany's comment.   "Well, we just thought of pranking our beloved daughter as a little payback for not calling us for the past few months."    "Okay~ I'll inform the other girls about this." The two elders thanked Tiffany before they went their separate ways.   .......   Somewhere with 8 of the girls.   "That's what Taeyeon's appa and eomma are planning." The others laughed at Tiffany's explanation.   "This will be fun.." Hyoyeon smirked as she high-five Sooyoung and Yuri.   "But remember to keep it a secret from Taeyeon. We'll be pretending that we don't know anything about the invitation." Tiffany reminded as the other girls nodded.   "We'll have to act well." Jessica stated as Yoona grinned.   "Well, we've all acted in musicals and dramas before. I think we'll be fine." Yoona gave all of them a thumbs up.   .......   PRESENT TIME   "What invitation?" Hyo