Who? Jessie J
What? We have calculated three possible reasons for this outfit:
1. Jessie J overslept and is wearing her pyjamas.
2. Jessie J's unfaltering dedication to skintight catsuits caused her to sabotage her stylist's well-meaning attempts to get her to wear something that isn't a skintight catsuit. For further reading, see our moving screenplay on the subject.
3. She felt like wearing this today. So just BACK OFF, OK?
Where? Leaving the Radio 2 studios in London.