Rihanna Sets New Chart Record

Rihanna has set a new chart record in the US. The singer's latest single "Stay" - featuring Mikky Ekko - has become her tenth number one on Billboard Mainstream Top 40 Radio Airplay Chart.

By having ten number one's Rihanna topples Katy Perry's record run of nine number one tracks on the same chart. The "Umbrella" singer also holds further records in the same chart, including most entries on the chart for an artist, with 35 songs.

While Rihanna's chart performances are holding up, she is having a hard time of her current Diamonds World Tour, and has had to cancel four shows in the US leg due to a recurring bout of laryngitis. After cancelling two shows in Texas earlier this month, she apologized to fans, writing on Instagram, "I kept working because I thought two days off after the Vegas show would be enough time to recover and I f****ed up, those were two days off from hell and today is not different! I'm sad and disappointed about it!"

Tonight Rihanna will perform in Baltimore, Maryland, the first of the previously cancelled shows she has rescheduled.

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Rihanna Cancels Concert

Rihanna has been forced to cancel her concert in Boston tonight.

The "Stay" singer - who kicked off her new Diamonds world tour on Friday night - has come down with a severe case of laryngitis but is hoping a two day break from performing will cure her in time for her next concert in Baltimore on Tuesday.

Live Nation shared the 25-year-old star's disappointment with gossip website TMZ.com earlier, saying, "Unfortunately, following her sold out concert on Friday, Rihanna has contracted laryngitis and per doctor's instruction is unable to perform this evening." But they said she is still scheduled to play a show in Baltimore on Tuesday, and her Boston show will be rescheduled.

A source previously claimed that Rihanna couldn't wait to get out on tour and took it easy in rehearsals so she could save her energy for her fans. "She's good, excited to kick off this [tour] and do it big. She's already hyped up and doing some light rehearsals but other than that, she's taking it easy. Saving all the energy for the show," an insider said.

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