What a nasty thread! That’s one snapshot of the party. Op you have no idea how much effort she put in organising it or what went on for the rest of the night. You also don’t know her presumably in person so you can only judge her from her tv persona.
My dd had an 18th birthday party and my dh and I were there for the first part and then made ourselves scarce for the second bit. I didn’t dance much but I do not have the youthful figure or energy that AH has! Go for it and enjoy life I say!
The only thing I know her from is her Italian house renovation series with Alan Carr and she comes across very well on that.