Grumpy Cat, an internet celebrity for her permanent frown, died on May 14 leaving behind countless online memes. She was 7. Despite care from top professionals, Grumpy died on Tuesday from complications after a recent urinary tract infection, the family said on Twitter. Grumpy Cat has helped millions of people smile all around the world - even when times were tough.

Some days are grumpier than others... pic.twitter.com/ws209VWl97