(CNN) It's good to let off some steam when the stakes are high.  And, for those competing in the Season 14 semi-finals of NBC's "America's Got Talent," the stakes are pretty high. 

Some of these contestants have used social media to showcase how they're prepping for Tuesday's live episode, which will be the first of two nights of festivities to air in this season's second week of semi-finalist showcases. 

The Detroit Youth Choir, which is an ensemble of kids ages 8 to 18, spent yesterday getting "golden buzzer ready" with haircuts. 

And acrobatic dance group V. Unbelievable did some sight-seeing not far from the Dolby Theatre, which is where the performances will be held. 

Singer Luke Islam wants fans to guess what song he'll be singing in the semi-finals.