Rihanna & Chris Martin Romance? Chris Brown's Ex Ditches Drake For Coldplay Singer, Sparks Collaboration RUMORS, Gwyneth Paltrow Jealous? [PHOTOS]

Back in 2012, Rihanna paired-up with Coldplay frontman Chris Martin for the hit Mylo Xyloto tune, "Princess of China" -

At-the-time, Gwyneth Paltrow's ex was psyched to work with the Barbadian songstress. He once told MTV that he wrote the song with RiRi already in mind:

"In like a dream scenario, we had a song that I'd secretly kind of written to see if Rihanna would want to sing it... nd then the rest of the band wanted to keep it, so we came up with the idea of asking her to sing it with us, and, to our great surprise, she said okay." 

He continued, "She has such an amazing voice and it's so different to mine... It took a while to pluck up the courage to ask her. We did a show in Las Vegas and I met her and said, 'Do you think there's any chance?' I was very Hugh Grant-like and spluttering about it."

How cute! Well, is another collaboration in the works? Or are sparks actually flying between Martin and Drake's ex?

Over the weekend, the duo was spotted grabbing a "private" dinner together at Giorgio Baldi in Santa Monica, CA. The two were all smiles, and appeared to be bonding over something...

Check out some photos of the dinner date (at one of RiRi's favorite restaurants) here.

Rihanna had yet to tease her Twitter fans about the impromptu meeting. Stay tuned as more details develop!