On the July 2 edition of MBC's radio program 'Sunny's FM Date', DJ Sunny had fellow Girls' Generation member, Tiffany, on as a special guest, which obviously allowed for some fun times for fans as they gave harmless but interesting dirt on each other.

Not only did Tiffany reveal on this day that she and Sunny used to fight a lot when they were younger but she also gave the details on Sunny's drinking habits - which turned out to be none!  She said, "Sunny is different depending on whether we are out for a meal as a group or drinking at home.  Sunny drinks with great self control and mental strength.  One day, we were drinking comfortably at our house and she got drunk, but I could not tell she was drunk.  She is a pro at the poker face."

SEE ALSO: Kim Jong Min and Ailee’s weddings set for the same day

She continued, "While we were drinking, Sunny says she would go in for a bit and come back later, but she does not return for a long time.  When that happens, she is sleeping very prettily."

Sunny added, "I'm sleeping like Snow White," causing more laughs in the studio.