Singer Baek Ah Yeon recently appeared on SBS powerFM's 'Choi Hwa Jung's Power Time' where she talked about her good buddy, Tiffany!

She revealed, "Recently, during a live broadcast, I tried calling Tiffany, but she did not pick up, so I was taken aback.  However, when I called her again, she picked up, so I was very relieved."

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DJ Choi Hwa Jung asked, "How did you get to be friends with Tiffany?" and the singer replied, "During the audition program in the past, we had a collaborative stage together, and since then, we've been on friendly terms."

Well, Tiffany is known to be sweet and social!