On Sunday night Rihanna dined at Giorgio Baldi in Santa Monica, and we're surprised that she didn't attend the Billboard Awards in Las Vegas. Then again, Chris Brown was at the show, so maybe that's why she skipped out on the event?

Rihanna later tweeted, "Thank you #BILLBOARD for showing my fans the love they deserve!!! I'm truly grateful for these 4 awards that you've rewarded us! Thank you again!! #MusicRdie #BBMAs ... #phuckyophanz #phuckyophav #betherenextyear."

The two have been embroiled in a nasty Twitter battle in recent weeks, and Chris seems to be back with Karrueche Tran, so Ri has every reason to want to stay away from him. And maybe she was also resting up for the European leg of her Diamonds tour? Ri has a show in Morocco on Thursday, and then she'll be making stops in Spain, Portugal, Turkey, England, France and Belgium, so she's definitely going to be busy!

But will she reconcile with this guy again? Or are they dunzo? He seemed to be just fine without her when he arrived at the show last night:

Rihanna donned a platinum wig and some cat-eye sunnies for an impromptu photo shoot with her bestie, photographer Melissa Forde.

The singer Tweeted "Just another day at the office" with these sexy snaps.

It's not the first time Ri's gotten her Marilyn on ... in the single "Love Without Tragedy/Mother Mary" on her latest album Unapologetic, the 25-year-old sings: "Red lipstick, rose petals, heartbreak / I was his Marilyn Monroe. Brown eyes, tuxedo, fast cars / A James Dean on the low."

Hmmm ... wonder who her James Dean is ...

She's back!

Last night, Rihanna was greeted by a bevy of fans when she touched down at LAX and got some support as they let her know how they felt about her ex Chris Brown.

The Unapologetic songstress has made headlines recently with her subliminal Twitter war with Chris Brown after their second split.

She's even had it out with some New York Knicks fans on the social media site who blamed her for JR Smith's shooting woes in the NBA playoffs after pics showed the two partying it up over the past few weeks.

Maybe some time away from the city that never sleeps is a good thing!

Rihanna's body might just be too bootylicious for us.

RiRi sported a sexy, yet demure look in her latest fashionable Instagram shot. The songstress donned a body-hugging, black maxi dress with a thigh-high slit that showed off a single toned leg and her mini gun tattoos. She made the look more sophisticated with Chanel round-rimmed sunglasses, Chanel two-toned strappy flats, and a printed scarf.

If this is how she greets summer weather, we're ready for a seasonal change.

Chris Brown must be hating himself now. The on-again, off-again couple has been engulfed in a bloody Twitter war since their latest break-up.

And although we like this leggy look, the zip maxi skirt she sported yesterday with a D.I.Y. T-shirt featuring an image of a woman pleasuring herself was a questionable combo, to say the least.

She must really want the world to know she's single and ready to mingle.

We knew it wasn't going to just end!

After exchanging subliminal tweets to each other earlier in the week, Rihanna decided to take it one step further when she tweeted the photo above with the caption, "Got a thang for a King, but chu ain't a King."

The 25-year-old entertainer also posted pictures of her with her girls as part of her ladies' night with the captions, "The reason y'all h** n****** can't phase me #nonewfriends," and "Bad girls want a real n*****.... Cuz real n***** just wanna *****."

Wow, someone's a little feisty since their split!!

My how things change so quickly!

On and off again couple Rihanna and Chris Brown, who have went their separate ways once again, took some passive aggressive shots at each other via Twitter over the week.

Rihanna kicked things off when she posted a picture on her Instagram account stating, "If I drop all my hoes for you and we still don't work out you owe me some hoes." Really now!

Chris couldn't help but retaliate when he tweeted, "She's not mine if she's everybody elses."

The former couple's Twitter war comes fresh off the heels of reports claiming Rihanna was partying with her ex, New York Knicks star J.R. Smith while Chris has been linking up with his ex Karreuche Tran.

Things could get interesting if this continues!

On Thursday evening Rihanna stopped by Best Buy in New York City wearing a super sexy outfit, but she wasn't there for a meet and greet with fans ... instead, we snapped the R&B superstar strutting through the store with the Razer Naga Gaming Mouse!

RiRi was joined by her little brother RJ, and she tweeted, "Spent the day with my favorite guy!!!! @rjfenty96 #bestdayever #mylilbroizbigazphuck #whyheposelikehechucknorris..."

We're guessing the mouse could be for her younger sibling, but last time we checked, her on-again/off-again boyfriend Chris Brown was an avid gamer too, so maybe she's trying to extend the olive branch with the $75 toy?

Only Rihanna could pull off an outfit like this!

The 25-year-old R&B star went to dinner at Da Silvano in New York City on Tuesday night wearing a pair of crazy cut out Tom Ford knee-high boots, shorts and a printed Mary Katrantzou top. As Tim Gunn would say, that's a whole lotta look!

Rihanna already had several concerts for her Diamonds tour on the east coast earlier this week, and she'll play three shows in Canada starting tomorrow, followed by shows in Boston and N.Y.C. next week. Ri then has a few weeks off before she heads to Morocco for a gig, so we're guessing she's going to go on another extravagant vacation. After all, it seems like she's broken up with Chris Brown as of right now, so you know she's not going to be hanging out in Los Angeles with him!