story. Reporter: For natalia it was just another date night with her boyfriend josh ogle until -- what's going on? Reporter: -- The music came on. ♪ I didn't realize what was happening until... See More
story. Reporter: For natalia it was just another date night with her boyfriend josh ogle until -- what's going on? Reporter: -- The music came on. ♪ I didn't realize what was happening until I finally grabbed the ring and put it on my finger. Reporter: Shortly after slipping on the ring josh swept his new bride-to-be off in a vintage car to a restaurant where they were wined and dined by a celebrity chef before jetting off to europe for a post-proposal celebration. It's very much in my character and I think in our relationship for me to try to do things that are goofy and clever and catch her by surprise. Reporter: But now simply getting down on one knee is something from the past. Like rendezvous and bollywood flash mobs. ♪ Want to be my -- Reporter: -- Are taking over the proposal scene. Some like these two couples even hiring film crews to document the engagement. With the advent of social media guys are thinking outside of the box. It's no longer a lame dinner proposal but things that are personal and unique to their love story. This way described me and who I am. ♪ Hey ♪ like a dream come true for any indian girl. It was bollywood. Dancing, music, everything we grew up with. I want to marry you. Reporter: And while these couples can now bank on fond memory, for many it trip to one to pay for it. It costs this man $2,000 to hire a choreographer for his flash mob in times square. As for josh, all in all the engagement ring, rooftop rental, vintage car rental, celebrity chef dinner and trip to cost him a whopping $45,000. That's more than a new car. Going all out for this proposal, was it worth it? The guy usually doesn't have donees of contrtons of control of the wedding but we have tons of control over this. Reporter: Despite the steep price tag natalia says that moment was priceless. To have that feeling and remember the feeling always i think is more important than just remembering the words, will you marry me. Reporter: For "good morning america," bianna golodryga, abc news, new york.
This transcript has been automatically generated and may not be 100% accurate.