By Robyn Collins
Over the years Swift has become known for celebrating the birthdays of those she cares about, which is why the Grammy award-winning pop star took to social media to wish her 1989 tour mate Shawn Mendes a happy 18th birthday by lip-syncing his hit “Treat You Better.”
Swift also took the opportunity to celebrate International Cat Day in the video by acknowledging the calendar event you probably didn’t know existed and wearing an epic hot pink cat sweatshirt.
Swift wasn’t the only celebrity to wish Mendes happy birthday. Nick Jonas and Zedd also hit Twitter to offer birthday greetings.