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