She’d jetted from New York to Los Angeles after a wild week of partying.
And while she dived straight back into some fun with her friends after arriving back on the West Coast on Sunday morning.
By the early hours of Monday Rihanna was looking as though her hectic schedule was catching up with her.
The 27-year-old looked subdued as the headed home from a late dinner at Kitchen 24, swapping her usually glam party looks for a low-key outfit of jeans and a T-shirt.
Rihanna covered her curves in a grey and red t-shirt teamed with skinny jeans ripped at the knee for the evening out.
The star ditched the heels in favour of some comfy white trainers and hid behind some round shades by Sunday Somewhere as she made her way home.
The Diamonds singer carried a lemonade out of the restaurant after a long day catching up with her California friends, with the star escorted to her car by a member of her security team.
After jetting in to Los Angeles in the early hours of the morning on Sunday, Rihanna headed straight for celeb hot-spot Geoffrey’s for drinks, downing a glass of wine as she continued her seemingly relentless pursuit of fun and frolics.

The Barbadian beauty was in the same t-shirt she wore for dinner later but instead of jeans, she teamed it with a long length skirt which skimmed over her hips and down to the floor.
She accessorised her unusually reserved ensemble with a number of gold necklaces and an armful of bangles which no doubt clinked as she guzzled on her refreshing glass of wine.
Rihanna appeared to be in great spirits as she spent the afternoon laughing and joking with friends outside.
The star touched down at LAX early Sunday morning, having flown in from the Big Apple where she was spotted at some of the city’s hottest clubs having jetted into NYC after spending some time back home in Barbados.
And on one particular night out, the star emerged at 7am after partying until sunrise with a group of pals and rumoured beau, Lewis Hamilton.
Rihanna’s fun-loving side was all too evident when a video emerged over the weekend of one of her recent girls’ nights.
Although it is not known exactly when and where the footage was taken, the 27-year-old was seen showing off her playful side during a boozy girls’ night.
The songstress was seen falling over a sofa as she held onto a bottle of wine, while hiding underneath a pillow with a face on it.
Meanwhile, rumours have been rife of a relationship between the hit-maker and Lewis, whose long-term romance with Nicole Scherzinger ended earlier this year.
They were recently seen cosying up to each other during the Kadooment Day event in Barbados just over a week ago, and have since been seen together enjoying each other’s company.
On Friday night, the two stars added more fuel to the fire as they were spotted arriving at The Griffin nightclub within minutes of each other.
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Source: Tampa Bay Times