Big Sean might be a rapper but he definitely has a soft spot when it comes to his new girlfriend Ariana Grande.

Big Sean Takes Jab At Naya Rivera In New Song, Teams Up With Ariana Grande For 'Research'

Grande revealed via Instagram Tuesday a super sweet (but potentially embarrassing) stunt that Big Sean pulled while the two were enjoying dinner. In the black and white snapshot the two smirk for the camera, but it was the caption that came as a bit of a surprise.

She wrote, "fyi he stood up on his chair & started singing stevie wonder at the top of his lungs after this photo was taken and i ran to the bathroom and hid (not actually)".

Details On How Big Sean & Ariana Grande Keep Spice In Their Relationship 'She Loves That Kind Of Thing'

While Big Sean and Grande kept their relationship under wraps in the early months, they are definitely open to sharing special and even candid moments with fans on a regular basis via their social media accounts.

Big Sean also shared the picture on Instagram but opted out of adding a caption.

Out of the two, Big Sean is the latest to gush about their relationship. He spoke with Complex magazine in its February/March 2015 issue. He has openly said that he won't open up too much about his former high profile engagement to Glee star Naya Rivera because he wants to respect his current relationship with Grande.

He confessed that he did confide in her, but their feelings for one another were always genuine.

"We started as friends. I'd never done that. Usually you meet a girl and then start dating. We always saw each other in the studio, and we'd talk about songs we were working on. It was cool to have a girl that I could talk to about my problems. I did that with her. It's not some fake-a--, inauthentic s--- when I say we were friends. This is something special and I appreciate every moment of it."

Take a look at the full interview here.