Lyric discussion by juanitotucupei 

Cover art for Vegas lyrics by Sara Bareilles

I sort of agree agree with sparo

I think its a song about living the dream chasing life, which more than likely will disappoint "and have a deep sleep upon a sweet dream i'll never realize"

But it seems like she is definitely is leaving someone behind, who is seeing this person runaway to follow her dream "but id' hate to lose you to the fortune you seek"