After the church has cleared out and the guests start heading toward the reception hall, the bridal party is out of sight for a while. They aren't seen again until their grand entrance, so there's some pressure to make it exciting.
Some wedding parties decide to have the individuals in their party choose the song they will enter to (possibly along with some choreographed dance moves with their beaus). In these cases, it's encouraged for bridesmaids and groomsmen to choose songs that describe them, but don't send guests running for the door.
According to The Knot website, these are the top songs for the the couple's and also for the bridal party's entrance.
Reception Entrance Songs for the Bride & Groom
1. Everlasting Love - Carl Carlton
2. Beautiful Day - U2
3. This Will Be (an Everlasting Love) - Natalie Cole