Britney spear slip ✔slip}
Britney arrow ❣revealing her ❣sensational curves}
Britney spear ❣unintentionally revealing a bit too much}
Britney lance ✔showed ❣inadvertently}
Britney spear with a ❣wardrobe malfunction}
Britney spear caught in an embarrassing slip-up}
Britney lance✔accidentally ✔flashing ❣on stage
Britney lance with a accident of elegance
These are just a few examples. Feel free to mix and match the synonyms to create more unique content.