re:unsigned links provided above, what they actually say.

1) "...one of the world’s biggest movie stars."
2) "...is probably the biggest film star in the world."
3) "...one of the biggest actors in the world…one of the richest actors in the world...and only comes second to American comedian Jerry Seinfeld on the list of top earning actors."
4) "...His personal earnings were estimated to be 26 million dollars by Forbes in 2015 and it ranked him as the world's 18th most highly paid actor."
5) "SRK is known to be not the nation’s biggest star but the world’s biggest movie star."
6) this link is a reprint of item 4.
7) "Khan, who is hailed as the world's biggest superstar."
again, nothing definitive here.  talk.