1) Someone who has gained confidence through self-acceptance
2) Beauty is in the eye of the beholder. A photobombshell is someone who is combats depression and negative self-perception by turning what they think are their "flaws" into their assets.
3) A photobombshell stops comparing themselves to the typical hot chick aka bombshell
She felt so out of place because of her differences, like someone who photobombed a photograph.
But, when she learnt to accept and embrace her unique qualities, she felt more beautiful for who she was and became more confident.
Instead of feeling like the person who photobombed a picture, she felt like the bombshell of it, therefore making her a photo bombshell