Tune in to NBC tonight at 9 PM to see what will happen next on "America's Got Talent" Season 9! Watch Episode 21, where we will see "Semi Finals 2 Results," the results of the second week of the semi finals round, using our free live stream links.

According to the official synopsis of "Semi Finals 2 Results," Episode 21 of Season 9, the second batch of semi finalists will find out if they will be one of the second six acts to advance to the next stage. According to the official AGT Twitter, "Maps" singer Adam Levine and his band Maroon 5 will also perform! Plus, the AGT crew has plenty of other surprises up their sleeves. Find out the final Top 12 for Season 9 of AGT tonight!

Make sure you tune in to NBC tonight at 9 PM to catch all of the Season 9, Episode 21 excitement!

Won't be able to catch "Semi Finals 2 Results," Episode 21 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 21 from your computer with "Animals" performer Maroon 5! If you miss 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)!

According to Zeibiz, "Last night, the remaining 12 acts from the 24 semifinalists hit the stage live at the Radio City Music Hall to impress America. Tonight, only six acts will get through and will have the chance compete in the next round of the competition. The six acts advancing tonight will complete the Top 12 of Americas got talent. Vying for the Top 12 spot tonight are AcroArmy, Baila Conmigo, Blue Journey, Christian Stoinev, Emil and Dariel, Jaycob Curlee, Jonah Smith, Kelli Glover, Mat Franco, Quintavious Johnson, Smoothini and Wendy Liebman. The acts who's already in the Top 12 are Mike Super, Sons of Serendip, Emily West, Miguel Dakota, Mara Justine and David & Leeman."

Reality Rewind predicts that "these are the six acts that will be moving on to the next round on AGT 2014: Jaycob Curlee, Mat Franco, AcroArmy, Blue Journey, Emil & Dariel, and Quintavious Johnson. Here is my reasoning: Quintavious is a great singer, even if he bored me last night. Jaycob had more connection with the song and I think he has some fans out there. Mat is great and cute, so he should move on. AcroArmy was beyond amazing and best act of the night....by far! Blue Journey and Emil & Dariel get a lot of love from the judges and the voters, so I don't think that will change tonight."

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

What else will happen tonight on "America's Got Talent" Season 9, Episode 21 featuring "One More Night" singer Adam Levin's band Maroon 5? 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 2 Results!"