John Travolta's daughter Ella had some happy news to share with her followers on social media over the weekend.The 21-year-old was delighted after discovering she had reached 500,000 followers on Instagram, and wanted to celebrate virtually with them all.MORE: John Travolta's daughter Ella unveils stylish hair transformationTaking to the photo-sharing platform, the actress posted a sweet video from inside her home in Florida to thank everyone for their support. VIDEO: John Travolta and daughter