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