As of my last update in September 2021, the following were some of the top three Guinness World Records in various categories. Please note that these records might have changed since then, so I recommend checking the official Guinness World Records website for the most up-to-date information.
Fastest 100m Sprint: The record for the fastest 100 meters sprint was held by Usain Bolt from Jamaica. He set this record at the 2009 World Championships in Berlin, with an astonishing time of 9.58 seconds.
Tallest Building: The tallest building record was held by the Burj Khalifa in Dubai, United Arab Emirates. As of 2021, it stands at a height of 828 meters (2,717 feet) and has 163 floors.
Most-Watched TV Series: The record for the most-watched TV series was held by "MAS*H," an American television show that aired from 1972 to 1983. Its final episode, titled "Goodbye, Farewell and Amen," was watched by an estimated 105 million viewers in the United States when it aired on February 28, 1983.
Again, I recommend checking the official Guinness World Records website for the latest information, as records may have been broken or new records established since my last update.