Ariana Grande is an American singer and actress born on this day in 1993. She rose to fame for her role as Cat Valentine in the Nickelodeon television series Victorious and Sam & Cat. She is currently the most followed solo female artist on the former, and the most subscribed on YouTube.

Did you know that:

• The first toothbrush was invented in China using boar bristles on this day in 1498
• Charles Newbold patented the first cast-iron plow on this day in 1797
• William Thomson Kelvin, a British physicist who invented the Kelvin scale, was born on this day in 1824
• Harry Potter and the Philosopher’s Stone, the first book in J. K. Rowling’s best-selling series, was published on this day in 1997

// Compiled by Zoya Siddiqui