Diana Ross made a surprise appearance at a Beyoncé concert in Los Angeles to wish her a happy 42nd birthday. After singing her hit “Love Hangover,” Ross led the audience in singing “Happy Birthday.”
Diana Ross scored her fourth solo No. 1 in the U.S. with "Upside Down". The song spent four weeks at the top of the Billboard Hot 100, becoming her most successful solo hit, and also reached No. 1 in nine other countries. It also topped the Billboard Top 100 Disco Chart and Hot Soul Singles chart and reached the Top 10 in another 17 countries.
Diana Ross's song “Touch Me in the Morning” reached No. 1 on the Billboard Hot 100, where it remained for one week. It spent 21 weeks on the chart in total, her longest chart run up to that point. It was her second US No. 1 single.
Seven months after marrying music executive Robert Ellis Silberstein, she gave birth to her first child, a daughter named Rhonda. Her biological father was later revealed to be Motown Records owner Berry Gordy Jr. Rhonda was raised by Diana Ross and Robert Ellis Silberstein and learned her father's true identity at the age of 12.
Diana Ross was at number one on the UK singles chart with “I'm Still Waiting”, which became her first solo UK number-one single. It remained at the top for four weeks after being heavily promoted by BBC Radio 1 presenter Tony Blackburn on his morning programme.