Rihanna features on Kendrick Lamar's 'Loyalty' ♫♫

Rihanna may not be releasing music of her own right now, but she's only too happy to hop on Kendrick Lamar's new song 'Loyalty.'

The cut is lifted off Lamar's fourth studio album, 'Damn.' Rihanna has been very scarce these days. Yet... a pesky pap hid behind a bush hundreds of yards away and snapped away at the bikini-clad beauty as she vacationed in Mexico this week.