India, May 23 -- Britney Spears caused panic among flight attendants with her activities inside a private jet. Sources close to the singer reported TMZ that Britney started to drink and even lit a cigarette inside the flight. This left many in shock, and prompted authorities to issue a warning to the singer. (Also read: Britney Spears changes entire staff as she vows to stay sober, revive music career: 'Can't afford to have bad influence')

As per the report, "Britney was flying with her security from Cabo San Lucas, Mexico to LAX when she started drinking -- then pulled out a cigarette, lit it, and started smoking." This prompted many to tell her to put out the cigarette inside the flight as it is strictly prohibited. Britney did so, but...