The Bachelor Presents: Listen to Your Heart

After a tough round of judging and tearful goodbyes, the final four couples take their relationships and performing talents to Las Vegas, traveling by luxury tour buses.

The six remaining couples survived the first round of musical performances, but another shocking surprise awaits them. They will be switching partners and going on dates with someone in another couple in order to test their relationships and their all-important chemistry. The drama reaches epic proportions before the couples prepare to hit the stage again with celebrity judges ready to weigh in on their musical talent and the chemistry expressed in their performances.

Savannah discovers that Brandon may have been two-timing her with Julia; each couple is assigned a song and starts rehearsing; the anxious couples are stunned to see who will be judging their romantic and musical harmony.

Twenty musicians -- eight women and 12 men -- from across the country arrive looking for love and musical chemistry; two men try to serenade the same woman; Ryan gets caught in a love triangle; Plain White T's put on a private concert for a pair.