Every one maybe at present or in the past you have some one in your lockscreen 
whom u loved so much 
Yes I did have a girl on my wallpaper and lockscreen and even in the files too Everytime I saw her it brings us joy but now it's a different story she faded and she's happy now and that's a beautiful memory when u had a person like that..I did have a WhatsApp notification I still remember it had a song from varanam ayiram and it break opens the screen and notify me that was my favourite notification during those days So if anyone has a person like that still do u are lucky charm to them She's the portrait that gives me smile