John Travolta and his daughter Ella have taken to social media in honour of Kelly Preston.The pair paid tribute to the actress as they marked their first Mother's Day since Kelly's death in July 2020.MORE: John Travolta expresses his heartbreaking experience with grief after losing wife Kelly Preston WATCH: John Travolta and daughter Ella dance in memory of Kelly PrestonElla, 21, shared a throwback photo from the family album that showed her cuddling up to Kelly.