What speech should I give at my mom's 50th birthday bash?

My family thinks I should say speech on the microphone for my mom's 50th birthday party. It will be a lot of people there. It doesn't have to be a long speech but im just trying to figure out what I should base it off of, since it's a birthday party not a wedding or funeral lol. I know 50 is a milestone though, so what do you all think I should say?
What speech should I give at my mom's 50th birthday bash?
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