I am tempting to make a similiar cake but I am not that good with a piping bag, worried about the dot line. Thougt I could print out a similiar pattern and use a a guide line and press into the cake and then insert suger pearls instead, what do you think, will that work or do you have a better idea :)

I use a bendy ruler and a pin to mark stuff like that.  Or, you could trace your pattern onto wax paper and then mark the swag part with pin dots and pipe over the small holes.

Wilton pink garland marker...

https://www.google.com/search?q=wilton+pink+garland+marker&source=lnms&tbm=isch&sa=X&ei=p261U6XmLtKNqAbSnoGgCg&ved=0CAcQ_AUoAg&biw=1280&bih=667

Thank you both :)