Cecilia Cheung really likes Singapore. The Hongkong actress, who lived here for several years in the early 2010s, was in town in April for the Star Awards and then in July for her sons' school holidays. And she's back on our sunny island again, this time with her youngest son, Marcus, and her alleged baby daddy.

When baby Marcus recently turned one earlier this week, Ceci gave her fans a sneak peak at her youngest son when she uploaded a pic of him on Weibo. Besides Marcus, the 39-year-old star has two other sons, Lucas, 12 and Quintus, nine, with her ex-husband, Hongkong actor Nicholas Tse.

And judging from her Instagram Stories, Ceci had a whale of a time in Singapore, going shopping on Orchard Road and meeting up with her friends here to celebrate part two of Marcus’s birthday.

In one of her IG Stories, Cecilia was seen holding Marcus in her arms while sitting next to a Caucasian male. And next to the guy was a baby pram and a toy car, which led netizens to assume that he is Marcus’s biological dad, whose identity is still a mystery.

Fans are also speculating that Ceci and the Caucasian guy had indulged in some couple time, after she posted a vid of her at the ArtScience Museum. Towards the end of the clip, a male voice could be heard giggling as Ceci thanked him in English before taking her phone back.

Now people are wondering if Ceci's decision to upload a pic of Boss Baby for her son’s birthday was a hint that her baby daddy is not Asian. After all, Boss Baby has blonde hair.

Also, the ang moh dude was with Ceci when she was in town in July with Lucas and Quintus for their school holidays.

There are more clues that suggest that he is Marcus' dad. When everyone was trying to figure out who her baby daddy was last year, Ceci replied to a fan: Can't it be a foreigner?”. Also, Ceci had deleted all traces of her Caucasian pal from social media when she was pregnant with Marcus, which only helped to fan the rumours that he might just be the kid's father.

As usual, Ceci’s IG comments section remains closed, and she continues to keep mum about the identity of her baby daddy.