Tune in to NBC tonight at 9 PM to see what will happen next on "America's Got Talent" Season 9! Watch Episode 19, where we will see "Semi Finals 1 Results," the results of the first week of the semi finals round, using our free live stream links.

According to the official synopsis of "Semi Finals 1 Results," Episode 19 of Season 9, the first batch of semi finalists will find out if they will be one of the first six acts to advance to the next stage. According to the official AGT Twitter, Ariana Grande, with her newly released album "My Everything," will also perform! Plus, the AGT crew has plenty of other surprises up their sleeves.

Make sure you tune in to NBC tonight at 9 PM to catch all of the Season 9, Episode 19 excitement!

Won't be able to catch "Semi Finals 1 Results," Episode 19 of "America's Got Talent" Season 9, on a TV? Well, we've got you covered with free online live stream links!

Check out a live stream of "America's Got Talent" on this NBC free live stream channel online - click here to watch Episode 19 from your computer with "Problem" singer and performer Ariana Grande! If you missed the episode of AGT, you can also catch it later by clicking here. 

What happened on "America's Got Talent" last night? Spoilers ahead (for those who have yet to watch the performance episode)!

The first 12 acts of the "America's Got Talent" 2014 semi finalists performed on last night's show. Check out the full list of semi finalists, with last night's "Semi Finals 1" performers in bold, courtesy of AL.com:

Comedians: Wendy Liebman, Dan Naturman

Dance acts: Aerial Animation, Bad Boys of Ballet, Baila Conmigo, Blue Journey,

Singers: Jaycob Curlee, Miguel Dakota, Kelli Glover, Paul Ieti, Quintavious Johnson, Mara Justine, Jonah Smith, Emily West

Music acts: Emil & Dariel, Sons of Serendip

Variety/Acrobatic acts: AcroArmy, Flight Crew Jump Rope, Andrey Moraru, Christian Stoinev

Magicians: David & Leeman, Mat Franco, Smoothini, Mike Super

As Bill King, a contributing writer of Buddy TV summarized, "The first group of semifinal performances are in the books, and while several of them were commendable, I don't think it's debatable that the night belonged, yet again, to Emily West. The rest of the crowd is a bit tougher to predict, though I think Paul Ieti, Mara Justine, The Bad Boys of Ballet and Dan Naturman are easy cuts.The middle is muddled, but I think we may have seen the last of Mike Super and Aerial Animation. That leaves four of Flight Crew Jump Rope, Andrey Moraru, Miguel Dakota, David and Leeman and Sons of Serendip to join Ms. West. For now, my money is on Flight Crew being the odd one out, but we also have to contend with the Snapple Save, which apparently involves America voting live in real time, a la Rising Star, on one act to keep around. So who knows what will happen?"

Catherine Cabanela of Buddy TV predicts that Emily West, Miguel Dakota, Mike Super, Sons of Serendip, Mara Justine, and Audrey Moraru will advance to the next round of "America's Got Talent" Season 9. What are your predictions for tonight's results show?

It will certainly be interesting to see which of the first set of semi finalist contestants continue, given the diversity of the AGT acts!

What else will happen tonight on "America's Got Talent" Season 9, Episode 19 featuring "Break Free" singer Ariana Grande? You'll have to wait and see! Tune into NBC, or one of our free online live stream links above, to catch all the excitement of this Season 9 episode, called "Semi Finals 1 Results!"