Sierra will join Voices for the Voiceless, a musical and comedy extravaganza to benefit You Gotta Believe’s efforts to connect older youth with family before they age out of foster care. Click here for tickets to the October 30th event.

Don't miss Sierra's return to 54 Below, September 4th to 9th. Click here for tickets.

Sierra made her Princeton Symphony Orchestra debut with conductor Lucas Richman. Click here to watch a video of the performance.

Sierra and stage and screen star Julian Ovenden (Downton Abbey) joined the New York Pops for the one-night-only concert My Favorite Things: The Songs of Rodgers and Hammerstein. Check out TheaterMania's photos here.