The Liberty X singer, 34, took her seven-week-old baby to Ballyroan Church in Dublin on Sunday (20 April) for his baptism.
While proud mummy Michelle looked gorgeous in a cream lace dress which hugged her amazing post-baby figure, cute baby AJ wore a traditional white Christening gown worn under a knitted cardigan.
Michelle and her personal trainer husband Hugh Hanley had picked the same church where their daughter Faith, two, was Christened.
The blessing comes less than a week after Michelle shared her relief that her son had been given the all clear following treatment for viral meningitis.
Big Reunion star Michelle had been left devastated when her five-week-old son was admitted to hospital in early April after falling unwell.
But, thankfully, the tiny tot has now been given a clean bill of health following treatment.
She tweeted at the time: 'Our beautiful baby boy Aaron Jay Hanley is home now and we couldnt be happier. It has been hell, I'm not going lie and only time will tell if Aaron has been physically or mentally effected with having had viral meningitis."
Before his special day, Michelle shared a photo of the adorable tot tucked up snugly in his car seat on Twitter.
She wrote: "Getting AJ into his car seat with his christening gown on was challenging to say the least ! Lol xx."
Michelle recently got a new tattoo of AJ's name on her body to go with the rest of the family.
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