Red Velvet made a surprise appearance on the last episode of 'Descendants of the Sun'. In the drama, the girl group visited the military base to hold a special performance. The reactions were phenomenal as the soldiers went crazy at the girl group's appearance. Red Velvet even made 'Suh Dae Young' and 'Yoo Si Jin' move their bodies to "Dumb Dumb".

Even though this scene brought loads of laughter, it is being criticized for its randomness. Viewers claim that Red Velvet's appearance was unnecessary, and even criticized SM Entertainment for PPL (Product Placement) and indirectly advertising their artist.

SEE ALSO: Jun Hyun Moo and BoA's drunken Instagram livestream surprised fans

In addition, Red Velvet is under the same label as SHINee's Onew, who took the role of 'Lee Chi Hoon' in the drama. Viewers believe this is another link to Red Velvet's random appearance.

Some netizens show discomfort as they commented, "Did SM give them money?", "Such a random PPL. Red Velvet was shown longer than the reactions of the soldiers", "I didn't understand why they suddenly appeared. Sudden girl group PR", etc. 

On the contrary, others didn't seem to care much about Red Velvet in the drama as they said, "Jin Goo was SO funny. Don't mind the PPL or whatever", "Hilarious to see Captain Yoo screaming, and the reactions of the girlfriends were even more funny", and more.

What did you think of Red Velvet on 'Descendants of the Sun'?