Pop star Rihanna was left fuming as she was caught on camera with her baseball star beau Matt Kemp after a romantic dinner.

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The "Unfaithful" singer who goes to great lengths to keep her relationships as private as possible, frowned at the waiting cameras as the couple was leaving Phillipe Chow's Chinese restaurant in West Hollywood, reports dailymail.co.uk.

Rihanna is currently enjoying a break from her worldwide "Last Girl On Earth" tour, which resumes in US next month.