What was Bruno Mars's first number-one single on the Billboard Hot 100?

Bruno Mars’s first number-one single on the Billboard Hot 100 was “Just the Way You Are.” Released in 2010, it was his debut solo single and the lead single from his first studio album, Doo-Wops & Hooligans.

The song reached number one on the Billboard Hot 100 chart dated October 2, 2010, making it a landmark moment in Mars’s early career. Its warm piano-led production and lyrics praising a woman’s natural beauty helped establish the romantic pop style associated with many of his early hits.

“Just the Way You Are” was written by Mars with Philip Lawrence, Ari Levine, Khalil Walton, Khari Cain, and Needlz. Mars and Lawrence also produced it through the Smeezingtons, alongside Needlz. The song later won the Grammy Award for Best Male Pop Vocal Performance.

Listeners sometimes choose “Grenade” because it also became a major number-one hit and followed “Just the Way You Are” from the same debut album. However, “Grenade” was the second Bruno Mars single to top the Hot 100, not the first.