The Singapore Zoo's Ah Meng the orang utan celebrated her sixth birthday yesterday with a scrumptious - but healthy - carrot cake studded with blueberries and topped with a nut-based icing. The non-dairy and low-sugar treat adhered to strict specifications from the zoo's animal nutritionist, said Wildlife Reserves Singapore in a press release.

Besides the surprise treat for the conservation ambassador, Ah Meng's carers and zoo guests sang her a birthday song.

Previously named Ishta, the birthday girl was renamed Ah Meng last year in memory of her grandmother, an iconic mascot of the Singapore Zoo. The elder Ah Meng, which died aged 48 - the rough equivalent of 95 human years - in 2008, was well-loved by both staff and visitors at the zoo.

The younger Ah Meng was chosen to assume her grandmother's name as she bore a "striking resemblance" in both looks and mannerisms to her namesake. These included a shared love for durian and cleanliness.

A video of the younger Ah Meng's birthday celebration was streamed live on the Facebook page of Wildlife Reserves Singapore, racking up over 2,600 views as of 5pm.