Apparently 2PM's Junsu was a YG trainee at one point so he knows G-Dragon, Taeyang, and Se7en very well and they still keep in touch and hang out sometimes. (Remember when they went bowling together?)

Yesterday, 2PM's Junsu, Junho, and Wooyoung came on Kim Heechul's radio show and in one of the corners the members had to text someone and see how the person responds.

Junsu texted G-Dragon, Taeyang, and Se7en together asking them to buy him a drink. Se7en responded saying something like "I was going to say "sure, call me up anytime if you're not busy" but i realized you were on the radio." and Taeyang responded too saying "sorry, i don't drink."

Source: mzangelgurl@se7en's soompi via nurika@bb's soompi