The DJ admitted that their collaboration on 'Titanium' was one of his favourite songs ever and said he will "definitely" record another track with the Australian singer in the future.
Guetta told Digital Spy: "Yes, she's amazing! Definitely, 100%. We worked together on 'Wild Ones', you know, and also we've been playing other records together and she's just incredible."
He continued: "One of my favourite records I've made ever is 'Titanium'. Sia was not necessarily the most famous artist on my album, but at the moment what's really exciting for me is to find really talented people who are not necessarily the most famous.
"Of course I'm happy to work with really big stars - it's a huge honour for me - but I'm also happy to discover new people and I think that's going to be a big challenge in the next few years."
'Titanium' was originally released as a buzz track for Guetta's Nothing but the Beat album in August 2011, but eventually went on to top the singles chart in February.
> Read Digital Spy's interview with David Guetta
Watch the 'Titanium' music video below: