Watch out Kim Tae Hee! There is another girl who has stolen Rain's heart and she's none other than Choo Sung Hoon's daughter Choo Sa Rang! Rain tweeted, "Lovable but really so lovable keke Sa Rang who is grooving along to the beat ke", along with a video of Choo Sa Rang watching the "La Song" MV. Choo Sa Rang put on her poker face as she blankly stared at the screen, making Rain and her father Choo Sung Hoon try to get a reaction from her with the hand movements to no avail. What was even more adorable was when Choo Sa Rang showed off her strength which she got in her genes from her MMA fighter dad.