Hello, Friends!  What could be sweeter than this retro style Happy Birthday Slimline Card made with Authentique's fabulously Retro Hooray collection?   I mean, just look at this adorable Birthday Chorus Line!  All those precious little people lined up in a row to sing their birthday wishes make my heart happy.  TIP: Slimline cards measure 8 1/2" x 3 1/2", making them perfect for a long image like this one cut from Hooray 1.  For easy fussy cutting, cut a straight line along the bottom of the image and loosely trim around the sides and top.  Then back with foam tape or your dimensional of choice to really make the image pop off the page. Spectrum Lady Bug Red and Caribbean Blue cardstock add vibrant color to the card base.   TIP: Mat patterned papers on cardstock to help define individual layers.   TIP: Die cut a circle from Hooray 3 and place it behind the singers.  This helps the black and white image to stand out from the patterned papers behind it. TIP: Mat the "M