The 34-year-old singer and the footballer were spotted together at the Barcelona airport waiting to catch a private jet, reported Daily Mail online.
They were also caught holding hands while exiting a restaurant earlier this week, with the Colombian singer appearing to be happy to get photographed with the sports star.
Pique, 24, also uploaded a photograph from his birthday party last fortnight, with himself, Shakira and his friends posing at the celebrations.
The duo first met last Spring while shooting the video of her song `Waka Waka (This Time For Africa)` which was the official track of the 2010 World Cup.
The `Hips Don`t Lie` hitmaker has also recently moved to Barcelona strengthening rumours of a romance.
The singer recently split from long-term boyfriend Antonio de la Rua, the son of former Argentine president, Fernando de la Rua.