Selena Gomez has revealed she loves going with her friend Taylor Swift because the pair always have a great time dancing with one another.The singer-and-actress is good friends with the '22' hitmaker and reveals that they love to get down on the dancefloor together when they meet up and had the "best time" grooving the night away at the Billboard Music Awards earlier this year.She said: "Me and Taylor love to dance! I was sitting with Taylor and Ed [Sheeran] and we were just dancing. When you have good people with you, you have the best time. You just make the best of every situation."However, the 20-year-old pop beauty isn't sure whether she could beat her close friend in a dance-off, saying Taylor would be "tough competition".In an interview with French Radio Station NRJ, she added: "Taylor can get down for sure. I don't know that's a tough competition. I like the way Taylor dances she's awesome."As well as partying with Taylor, the 'Come and Get It' hitmaker is looking forward to a big bash with all of her friends for her 21st birthday on July 22, and Selena insists seeing her pals is better than a gift.The 'Spring Breakers' star - who has an on/off relationship with Justin Bieber - said: "I didn't ask for anything for my birthday. I'll be 21 so I actually just want to have a, big party where my friends can come and my family can fly out from Texas. That's all I want - everyone together."