f(x)'s Amber showed her support for labelmates Red Velvet's debut on August 1, even taking a congratulatory snapshot with Seulgi!

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"Congrats on your debut, bear^^ I ask that you show your support for our Red Velvet keke happiness!", she shared on her Instagram, bringing 'happiness' as she said cheese for the camera with the rookie group member Seulgi.

Amber also wrote on Twitter with the same photo, "Happiness! Please give our Red Velvet support keke. A shot with bear Seulgi ^^ Happy debut bear keke." 

Red Velvet will officially release their debut digital single "Happiness" on the 4th!