Announcing Aunt’s Birthday at Bridal Shower?

My mother is hosting my bridal shower this Sunday (4/3/22) and a few of the elements are not what I would have normally chosen (no wine allowed at the venue, family members I’m not close to invited, some guests having to bring a “+1” because they’re unable to come on their own). But I’ve brushed these off as it’s much easier to go with the flow. However, I’m not sure how to navigate this one situation. My aunt’s birthday is on the day of the bridal shower and my mom is requesting I make an announcement at the shower for it. I’m not too upset about the idea (though I find it a bit odd), rather, I don’t know what to do to make an announcement without it being very awkward. When do I say it, what do I say? Do we sing happy birthday for one of my guests at my bridal shower? The whole situation is peculiar to me. Any advice on how to just get it out of the way without an incredibly weird moment would be much appreciated!