TAIPEI — Taiwanese pop diva Jolin Tsai 蔡依林 posted photos to her Instagram on Monday, showing six of her friends celebrating her 40th birthday one day earlier.

The A-list celebrities in the photos include Valen Hsu 許茹芸 and Tanya Chua 蔡健雅 and Wu Tsing-Fong 吳青峰 who seem as young as before, sparking heated discussions among social media users.