Help - concert clothes

[Gameset]

I have about 36 hours to buy something suitable to wear to a rock concert (indoor). I'm 45, dark haired, 5 ft 4, and a size 12 to 14- carry weight on my hips and stomach. I would like something bling which I can get in a physical store like Zara, John Lewis, Oliver Bonas etc., stock permitting, since too late to order. Ideally dress or jumpsuit. I'm in London. Would appreciate suggestions please.

I went to a rock gig in Glasgow last month at the Hydro and it was roasting (standing area). Wished I’d worn shorts and t shirt! Was sweating buckets in my top and jeans.

Just to add re footwear - Primark do a Converse copy with a slight platform. The extra cushioning is great if you like to dance and no worries if beer gets spilled all over them.

Do not get a jumpsuit. The toilets in these venues are not always nice and jumpsuits make it more difficult

I'm 5ft 4, size 12 with a pre-meno tummy My absolute favourite outfit is a pair of black jeans & my All Saints Dinah top. So flattering and hides what needs to be hidden. https://www.next.co.uk/style/su245622/m03335 It's a bit pricey though.

I generally wear it with black boots and my leather jacket.

If it is hot then shorts would do. I also have a sparkly All Saints t shirt I bought from the outlet shop which is nice.

This is gorgeous https://www.johnlewis.com/allsaints-florence-kora-sheer-embellished-top-black-multi/p111867831 but you might need to wear something underneath if you have a body type like mine

I usually go for a band t shirt and jeans/shorts or black trousers of some kind (have some silky cargo trousers that are perfect for warmer occasions) or "nice top" with same.
Next will probably have a few sequin or sequin embellished tops (probably better in warm weather than full sequin), like this one
https://www.next.co.uk/style/ls425772/k92990#k92990

Thank you. Not a date (unfortunately). Going with a group of friends. We do have seats. Black t and jeans it is. I don't have a band tshirt.

It is indeed gorgeous. I wish I could carry off that look!