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