Umbrella star Rihanna has pulled out of a second UK show on doctor's orders.
The singer, who cemented her fame with the hit single, had been due to perform tonight at Birmingham's NEC Arena.
But a statement on the venue's website confirmed the gig had been postponed on "doctor's instructions" to the 19-year-old.
The postponement of tonight's show comes after the R&B star pulled out of a performance in Nottingham on Saturday night, just hours before she was due to go on stage.
It is understood a third show, due to take place in Bournemouth tomorrow, has also been pulled.
"Rihanna appreciates the love and support of all her fans and wants nothing more than to see and connect with them," the NEC statement said.
"We apologise for any inconvenience caused."
Fans who were due to attend tonight's performance in Birmingham have been told they can use their existing tickets to attend a rescheduled gig on December 18th, while those who are unable to attend the new date will be able to obtain a refund.
The cancellation of the shows marks a set-back for Rihanna's first headline tour, which began in Paris last month and is due to end in Moscow on December 21st.
Last winter the singer performed with the Pussycat Dolls, while she also sang at the recent Live Earth show in Tokyo.
Rihanna, who was discovered by US rapper Jay Z, first burst onto The Music scene with the single Pon De Replay, which went to number two in the UK charts and was followed by subsequent songs S.O.S and Unfaithful.
However, it was Umbrella which provided the star with her first number one song, becoming the fastest selling download single of the year after it was released digitally on May 4th.
Umbrella is only the third ever single to reach the top of the UK charts on downloads alone.