Rihanna is "giddy" after Drake surprised her with a billboard.

And Rihanna, 28, was touched by the romantic gesture.

A source told HollywoodLife.com: "That's the sweetest thing any man's ever done for Ri. She's still in shock and has been being all giddy about it since it's gone up.

"It's really hard for Rihanna to shake Drake, especially when he goes out of his way to do something so sweet and on the highest magnitude possible. His congratulatory Billboard is epic and one for the ages.

“She certainly appreciates the gesture and once this weekend cools off she's going to personally thank Drake and talk to him about what they want to do now that she believes he's interested in her and wants more."

Rihanna couldn't hide her delight when she shared a picture of her billboard on Instagram and captioned it: "When he extra" alongside an emoji of a trophy.

The cute gesture has set tongues wagging that the pair - who used to be an item - are secretly dating again and there's no doubt that they're still extremely close, given Drake's recent display of affection.

What's more, they've collaborated on a number of love tracks - most recently 'Work' and 'Too Good' and previously 'Take Care' and 'What's My Name' - and the 29-year-old Canadian rapper and Bajan singer have outrageously flirted on stage throughout Rihanna's 'Anti World Tour'.