Britney spear slip wardrobe mishap}
Britney arrow showing
her ✔sensational curves}
Britney arrow♥unintentionally revealing a bit too much}
Britney spear exposed inadvertently}
Britney lance ✔with a ✔wardrobe malfunction}
Britney lance caught in an ✔awkward ❣slip-up}
Britney arrow✔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.