PHOTOS: Cody Simpson, Rachel Crow and Big Time Rush at Shoreline Amphitheatre

Ever think Justin Bieber's time as a teen heart throb might end? Well, meet Cody Simpson.

Fifteen-year-old Australian pop star Cody Simpson performed Sunday, July 22 at along with 14-year-old Rachel Crow and the native Minnesotan boy band Big Time Rush.

But though Patch couldn't be there, many thousands of fans were. Thank goodness for Twitter! Here's some of the best tweets and photos from the night:

 ‏@iamrachelcrow It's do beautiful here at Mountain View CA can't wait to perform in a couple hours #rachelcrowmountainview

‏@CodyTourUpdates Shirtless Sunday pic.twitter.com/uEEJW5l7

‏@iamrachelcrow Today's dressing room is especially wonderful :) ☺ http://instagr.am/p/NZaiZdEWQb/

@CodyTourUpdates Cody at VIP today http://instagr.am/p/NZ98_sGhR_/

@iamrachelcrow Hello there little guy http://instagr.am/p/NZaxXsEWQl/

@CodyTourUpdates Sound check today http://instagr.am/p/NZ-SwbtSJm/

@BigTimeZayn1D @codysimpson :) #BTR #concert #woohoomountainview http://instagr.am/p/NbjVAwSt_I/

@SteventFerdians @CodySimpson: getting ready to hit the stage in Mountain View California! #yeeeww"

@ssbot Cody Simpson Sighting: Mountain View, California/ Shoreline Amphitheatre http://bit.ly/NLYMmS

@JohnWhittJr Show 14! Mountain view, ca another great show! @codysimpson @tarroncrayton http://instagr.am/p/Nbvd94ywzJ/

‏@LaurenSaysHi @CodySimpson: Mountain View you were so sick<3 Paso Robles see you mañana. #CaliforniaLove” I was there!!! <3

‏@BigTimeZayn1D @1LoganHenderson @HeffronDrive @jamesmaslow @TheCarlosPena the concert was so fun!! #woohoomountainview pic.twitter.com/YqBElA8i

‏@ItsMattGraham Its a wonderful day in Mountain View Cali. @CodySimpson showed everyone why he's a superstar last night. Seeing my wife tonight. #yewww