Name That Tune

Christmas is over, and so is Name That Christmas Tune.

A lot of people had fun I hope.
I decided to make this a "Self-Scoring" contest and count everybody a winner, even those who didn't send in an entry but only mentioned songs to me.

As you figured out, starting with only three (or four) notes often produces several songs that fit (like #14 and #15).
Give yourself credit if you think your's is correct.

Susan Livingston
Marlene Bagley and Lori
Helen Learned
Marilyn Cieslik
Gwen Baker
Dennis Silkebakken
Greta Grimes
Rudolph
Gary Grinch

In the boxes below the top link is the short version, the bottom one is the answer. 

1 It's Beginning to Look a Lot Like Christmas.

2 Santa Claus is Coming to Town.

3 Silent Night.

4 White Christmas.

5 Joy to the World.

6 Go Tell it on the Mountain.

7 O Christmas Tree (Tannenbaum).

8 Little Drummer Boy.

9 The Twelve Days of Christmas.

10 Deck the Halls.

11 Do You Hear What I Hear?

12 Let it Snow.

13 God Rest Ye Merry Gentlemen.

14 Jingle Bells.

15 Jingle Bell Rock (Ha Ha).

16 Rudolph the Red-Nosed Reindeer.

17 I Want a Hippopotamus for Christmas.

18 Ding Dong Merrily Along.

19 I'll be Home for Christmas.

20 Frosty the Snowman.

21 O Come All Ye Faithful (Adeste Fideles).

22 Grandma Got Run Over by a Reindeer.

23 You're a Mean One, Mr Grinch.

24 The Christmas Song (Chestnuts).

25 We Wish You a Merry Christmas.