Katy Perry though she saw a UFO.
The 'E.T.' singer was looking at the sky in Hollywood when she noticed strange lights above her, which she was convinced were space ships.
However, after taking another look, the pop beauty realised the unusual shapes she was seeing were in fact sky divers.
She wrote on her twitter page: ''Just saw sky divers LIGHT up the HOLLYWOOD SKY. I've never seen this ... I thought, finally the aliens ... Nope, some new sky diving thang #RAD (sic)''
Although she didn't get the close encounter of third kind she was hoping for, Katy had a great experience at the Grammy Awards on Sunday night (12.02.12).
The 27-year-old star performed new track 'Part Of Me' in a skin-tight, metallic jumpsuit and the track seemingly contained several lyrics aimed at her ex-husband Russell Brand.
Lines included: ''You chewed me up and spit me out/Like I was poison in your mouth/You took my light, you drained me down/That was then and this is now'' and ''Keep your diamond ring, in fact, you can keep everything - except for me''.
Katy was also seen hanging out at the glitzy ceremony with her friend Rihanna, who sent pulses racing in a black gown split to her navel.