4minute's HyunA and f(x)'s Amber celebrated their 7-year friendship with a photo together!

On February 6, Amber posted the above picture on Instagram with the message, "My 7-year friend HyunA. We're old now. '92 line. Ah, my waist is pretty age 24." The two well-known idol friends made goofy faces, sticking their tongues out. 

Fans responded, "Please do well, f(x)," "It'd be fun to see you both MC together," "Unni, you're not old," "So cute," and more.

In other news, Amber will be making her solo debut with "Shake That Brass" featuringGirls' Generation's Taeyeon, and HyunA will be returning with 4minute's upcoming track"Cut it Out".