Kat was planning a family holiday but had to cancel.
"Katrina received an urgent return-to-duty call from Yashraj Films to not just learn some heavy-duty stunts but also exercise her vocal chords for her role in the sequel to Dhoom. She will need to undertake paragliding lessons and a full-fledged singing course for the project. Katrina has to go one up on the last Dhoom heroine Aishwarya Rai. That's a tall order in itself," a source told Subhash K Jha.
This is the first time Katrina Kaif will be crooning. She is also expected to sing in her Mere Brother Ki Dulhan co-star Ali Zafar's album.
Katrina will star opposite Aamir Khan in the third part of Dhoom series. Abhishek Bachchan and Uday Chopra will reprise their role.